British Oxygen Co Ltd v Minister of Technology

Factual and Procedural Background

The Appellant, a manufacturer of industrial gases, sought declarations that certain delivery equipment—two sizes of liquid-gas tankers, trailer-mounted hydrogen cylinders, and individual returnable gas cylinders—qualified for investment grants under the Industrial Development Act 1966. After prolonged correspondence beginning in 1966, the Respondent (then the Board of Trade, later the Minister of Technology) refused grant applications, citing statutory exclusions for “vehicles,” a discretionary £25 cost threshold, and a policy against funding equipment serving primarily distributive functions. The Appellant issued an originating summons in 1967. Following an adverse decision in the Court of Appeal, the Appellant brought the present appeal to the House of Lords.

Legal Issues Presented

1. Whether the tankers and trailer-mounted cylinders are “vehicles” excluded from the statutory definition of “machinery or plant,” or whether their tank and cylinder components can be treated as separate eligible plant.
2. Whether individual gas cylinders costing less than £25 can nevertheless constitute approved capital expenditure eligible for grants.
3. Whether the Respondent’s adoption of a general policy (or rule) declining grants on items below £25, or on equipment serving mainly distributive functions, is lawful.
4. Whether the Industrial Development Act 1966 imposes a duty on the Respondent to make a grant once expenditure is shown to fit within statutory eligibility.

Arguments of the Parties

Appellant's Arguments

• The tank and pump parts of the tankers, and the trailer-mounted hydrogen cylinders, are distinct from the vehicle chassis and therefore fall within the exception for plant permanently attached to a vehicle carrying no other load.
• Individual cylinders are plant used for storage or packing incidental to the making of gases and should be eligible regardless of unit cost.
• The Respondent is not entitled to apply an inflexible £25 minimum-cost rule, nor to refuse grants solely because equipment performs a distributive function.
• Once expenditure meets the statutory criteria, the Respondent has a duty to pay the grant and cannot withhold it on policy grounds unrelated to eligibility.

Respondent's Arguments

• The tankers and hydrogen trailers are single integrated vehicles; their tanks and cylinders are parts of those vehicles and therefore excluded under section 13.
• The Act gives the Respondent a broad discretion: grants “may” be made. No applicant has a right to payment merely because expenditure is eligible.
• A policy not to pay grants on items costing under £25, and to exclude equipment primarily used for distribution, is a legitimate exercise of ministerial discretion.
• The Respondent has considered the Appellant’s representations and therefore has not “shut its ears” to the application.

Table of Precedents Cited

Court's Reasoning and Analysis

Exclusion of Tankers and Hydrogen Trailers: The House, per Judge Reid, held that the tankers are designed and used as single units for transporting liquefied gases; they are therefore “vehicles” wholly excluded by section 13, and their tank components cannot be notionally severed. As to hydrogen trailers, although the cylinders are detachable for maintenance, in practical use they remain fixed; they thus form part of the vehicle and share the exclusion.

Eligibility of Individual Cylinders: The Court distinguished the loose cylinders used on the Appellant’s premises. When filled and stored before dispatch, they are plant used for “storage” incidental to the making of gases under section 1(3)(b). Dual use (storage on premises and later delivery to customers) does not disqualify them, though apportionment of expenditure may be necessary.

Ministerial Discretion: The statutory language “may make grants” confers a broad discretion. The Act supplies eligibility criteria but no guidance compelling payment. The Court found no individual right to a grant; discretion is limited only by the prohibitions on bad faith and Wednesbury unreasonableness.

£25 Cost-Threshold Policy: Applying the principle in R. v. Port of London Authority, the Court accepted that a general policy (even one amounting to a “rule”) is lawful if the authority remains open to representations. Evidence showed the Respondent considered the Appellant’s case; hence the policy did not constitute an unlawful fetter.

Outcome on Declarations: The House agreed that only expenditure on loose cylinders could in principle be approved; it rejected declarations regarding the tankers and hydrogen trailers. Because the Act imposes no duty to pay grants, the requested mandatory declaration was refused. A minor variation of the Court of Appeal’s order was made to reflect partial success on the cylinder point.

Holding and Implications

APPEAL DISMISSED (with minor variation). The Court awarded the Respondent three-quarters of its costs in the House of Lords.

Implications: The decision confirms (1) that equipment forming part of a vehicle remains excluded from investment grants, (2) that storage containers may qualify where used in production-related storage, and (3) that a minister may adopt and publish general policies—such as cost thresholds—when exercising an unfettered statutory discretion, provided individual applications are still given genuine consideration. No new precedent was set, but the judgment clarifies administrative discretion under the Industrial Development Act 1966.