Deterrent Custody for Prison Drug-Smuggling Conspiracies Despite Brief Involvement and No Delivery

Introduction

In R v Sallis [2026] EWCA Crim 600, the Court of Appeal (Criminal Division) (Soole J, Holgate LJ and HHJ Michael Simon (sitting)) dismissed an appeal against a sentence of 30 months’ imprisonment imposed for conspiracy to convey a List A article into prison, contrary to s.1(1)(a) Criminal Law Act 1977.

The conspiracy involved (i) the appellant, (ii) a serving prison officer at HMP Coldingley, and (iii) a serving prisoner at the same establishment. The plan was that the appellant would supply Spice (treated as a Class B drug for guideline purposes) by soaking it onto envelopes to be posted or otherwise delivered. No drugs entered the prison: a postal strike prevented posting and alternative collection arrangements did not proceed; the trial judge found that the appellant withdrew for commercial reasons rather than conscience.

The appeal focused on whether the sentence was manifestly excessive, given the short period of involvement and the absence of any actual importation, and whether very substantial personal mitigation required a lower (and possibly suspended) sentence.

Summary of the Judgment

  • The Court of Appeal upheld the trial judge’s approach of sentencing by measured reference to the definitive guideline for supply of Class B drugs, in the absence of a definitive guideline for the prison conspiracy offence.
  • It endorsed a substantial upward adjustment from the guideline starting point to reflect the deterrent requirement for prison-related drug offending.
  • It held that the appellant’s personal mitigation carried strictly limited weight in the context of this offence.
  • It found no unfair disparity between the appellant’s sentence and those imposed on co-conspirators.
  • Even if the custodial term had been reduced into a range permitting suspension, the court stated it would still have been wrong to suspend given the gravity and deterrent imperative.

Analysis

Precedents Cited

No individual appellate authorities are named in the transcript. However, the judgment proceeds on two established strands of sentencing law regularly applied by the CACD:

  1. Analogical use of guidelines where no definitive guideline exists. The sentencing judge, endorsed on appeal, treated “authority” as supporting a structured approach by reference to the definitive guideline for supply of Class B drugs (Spice included). This reflects a wider appellate practice: using an analogous guideline to secure consistency, then adjusting for features unique to the instant offence (here, the prison context and deterrence).
  2. Deterrent sentencing for prison contraband and corruption risks. The judge’s repeated emphasis—approved by the CACD—that prison-drug offending “required deterrent sentences and immediate custodial terms” reflects long-standing appellate insistence that conduct threatening prison order and safety demands sentences that speak beyond the individual offender.

The court also noted the sentencing judge’s consideration of “overarching guidelines on totality and on sentencing offenders with mental disorders” (again without naming specific guideline documents), indicating that general guideline principles remain engaged even where the primary offence guideline is applied by analogy.

Legal Reasoning

(1) Guideline anchoring and uplift for the prison context

The judge placed each defendant within the supply guideline as significant role and category 3 harm, producing a 12-month starting point and a 6 months to 3 years range. The sentencing judge then stated the offending lay “at or near the top end” of that range, despite two potentially moderating features: (i) the maximum penalties for certain prison-related offences being lower than for drug supply, and (ii) the fact that no drugs actually entered the prison.

The CACD agreed that, for a conspiracy “of this type”, a substantial upward adjustment from 12 months was justified. It treated deterrence in the prison setting as the critical driver: conspiracies to introduce drugs into prison create acute risks to safety, discipline, and the integrity of staff-prisoner boundaries, and thus warrant a sentence calibrated to discourage others.

(2) Brief participation and “no delivery”: why they did not materially reduce sentence

The appellant relied on the short-lived nature of her involvement (about two days), the lack of any infused envelopes, and the fact that no drugs entered the prison. The CACD accepted that the judge took these matters into account, but held they were counterbalanced by two findings of fact:

  • The absence of importation was not because the plan was abandoned for ethical reasons; it was prevented by external factors (postal strike) and by the appellant’s disengagement for commercial reasons.
  • Although short-lived, the appellant’s intended role was “nonetheless crucial” because supply was central to the plan’s execution.

The court thereby reaffirmed that inchoate liability (here, conspiracy) is sentenced by reference to the agreed criminality and intended function within it, not merely by the happenstance of whether the harm eventuates—particularly where non-completion is not attributable to voluntary, principled withdrawal.

(3) Personal mitigation: “strictly limited weight” for this offence type

The appellant advanced strong mitigation supported by a psychiatric report and pre-sentence report: severe childhood adversity, homelessness, trauma, stabilised mental health on medication, positive references, and a view that she could be managed in the community with imprisonment potentially destabilising.

The CACD’s key statement is that this mitigation had strictly limited weight “in the context of this offence”. The reasoning is not that such mitigation is irrelevant, but that it is subordinated to the seriousness and deterrent objectives of prison-drug offending. In effect, the judgment draws a boundary: even compelling welfare-based mitigation will not ordinarily displace immediate custody where the offence strikes at prison safety and integrity.

(4) Parity and disparity with co-accused

The appellant argued unfairness by comparison: co-conspirators were involved over a longer period, yet her sentence approached the top of the range. The CACD rejected this, emphasising functional contribution over duration: the appellant’s supply role was essential, and the overall sentencing picture did not reveal “unfair disparity”, particularly given:

  • The prisoner co-conspirator received 27 months after guilty plea credit (the judge indicating 36 months after trial).
  • The prison officer co-conspirator received 3 years for the conspiracy, and 3 years 6 months total when combined with misconduct in public office.

(5) Suspension: deterrence as a barrier

The CACD went further than merely upholding the length. It stated that even if the term had been reduced into a range that would “permit consideration” of suspension, it would not have been right to suspend. This is a clear signal that, for prison-drug conspiracies, immediate custody will commonly be treated as a necessary expression of seriousness and deterrence.

Impact

The decision strengthens and clarifies several practical propositions for sentencing and appeals involving prison-drug conspiracies:

  • Analogous guideline methodology is endorsed: where no definitive guideline exists for conveying items into prison, courts may anchor sentencing to the drug supply guideline and then adjust for prison-specific seriousness.
  • Deterrence can justify substantial uplift even where (i) the conspiracy is short, and (ii) the plan is not completed, provided the absence of completion is not meaningfully attributable to voluntary desistance.
  • Mitigation may be constrained by offence context: trauma histories and mental health vulnerabilities, though important, may carry reduced weight where the offence threatens prison safety and institutional integrity.
  • Suspended sentences are disfavoured for this offence type, with the court expressly indicating immediate custody as the appropriate norm in serious prison-drug conspiracies.
  • Parity focuses on role: appellate review of disparity will consider whether the offender’s function was pivotal, not simply how long they were involved.

Complex Concepts Simplified

Conspiracy (Criminal Law Act 1977)
An agreement between two or more persons to pursue a course of conduct that will necessarily amount to or involve the commission of an offence. Liability arises from the agreement itself, even if the offence is not completed.
List A article
A category of prohibited items for prison entry purposes (commonly including controlled drugs). Conveying or attempting to convey such items into prison is treated as inherently serious because of the risks it creates inside prisons.
Sentencing by “measured reference” to an analogous guideline
Where there is no definitive guideline for the exact offence, the court uses the closest relevant guideline (here, Class B drug supply) as a structured starting point, then adjusts to reflect differences in harm, culpability, and policy aims (here, deterrence in prisons).
Manifestly excessive
The appellate test is not whether the appeal court would have imposed a different sentence, but whether the sentence is outside the range of reasonable sentences open to the judge, given all relevant factors.
Totality
The principle that when sentencing for multiple offences, the overall sentence must be just and proportionate to the offending as a whole.

Conclusion

[2026] EWCA Crim 600 confirms a robust sentencing stance for conspiracies to introduce drugs into prisons: courts may legitimately anchor the assessment in the Class B supply guideline yet move markedly upward to reflect deterrence and institutional harm. The judgment also signals that strong personal mitigation and the non-occurrence of the intended harm will not necessarily prevent a near-top-of-range sentence, nor will they ordinarily justify suspension where the offence involves prison drug smuggling.