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The London Bullion Market Association (LBMA) is the international trade body overseeing the London OTC (over-the-counter) precious metals market. It sets the standards for gold and silver bar quality accepted by the global market, maintains a list of approved refiners and vaults, and administers the LBMA Good Delivery specification - the benchmark that defines what qualifies as investment-grade gold.
For UK investors, the LBMA matters primarily in two ways: it defines the quality standard for gold bars, and it runs (via ICE Benchmark Administration) the twice-daily gold price auction that underlies all dealer pricing.
At a glance
| LBMA function | What it means for UK investors |
|---|---|
| Good Delivery standard | Defines bar quality required for investment gold |
| Approved refiner list | Bars from approved refiners are accepted globally |
| Approved vault list | LBMA-accredited vaults meet security and audit standards |
| Gold price auction | Sets the reference price used by all UK dealers |
| Responsible sourcing | Bars must meet chain-of-custody standards |
What is the Good Delivery standard?
The LBMA Good Delivery specification defines the minimum requirements for a gold bar to be accepted by professional market participants globally.
For gold, a Good Delivery bar must:
- Weigh between 350 and 430 troy ounces (approximately 11–13.4 kg)
- Be at least 995 fine (99.5% pure gold)
- Bear the mark of an LBMA-approved refiner
- Include the bar’s serial number, weight, fineness, and year of manufacture
These large bars - sometimes called London Good Delivery bars - are what central banks hold, what vaults store, and what physically-backed gold ETCs are typically backed by.
Why Good Delivery matters for retail investors
UK investors rarely buy Good Delivery bars directly - they’re too large (a 400 oz bar is worth roughly £1 million at current prices). But the standard matters in two ways.
First, vaults that hold fractional gold on your behalf (BullionVault, Royal Mint Vault, The Pure Gold Company) typically hold their reserves as Good Delivery bars and allocate portions to customers. Knowing the vault holds LBMA-accredited gold gives confidence about bar quality and audit integrity.
Second, when buying smaller bars (1 oz, 100g, 1kg), choosing bars from LBMA-approved refiners - PAMP, Umicore, Metalor, Valcambi, Baird, Royal Mint - means the bar is universally recognised by dealers and vaults. Less well-known brands may be harder to resell.
The LBMA approved refiner list
The LBMA maintains a Good Delivery list of approved refiners. Bars from these refiners are accepted without additional assay by LBMA members globally.
Commonly encountered LBMA-approved refiners for UK retail products:
| Refiner | Country | Notes |
|---|---|---|
| PAMP | Switzerland | Premium Swiss refinery, widely recognised |
| Valcambi | Switzerland | Major refinery, CertiCard and assay options |
| Metalor | Switzerland | Long-established, LBMA-approved |
| Umicore | Belgium | Recognised globally |
| Heraeus | Germany | Major industrial refiner |
| Baird & Co | UK | UK’s only LBMA-approved refiner |
| Royal Mint | UK | Listed; produces UK coin and bar products |
Bars from refiners not on the LBMA Good Delivery list may require re-assaying before a vault or dealer will accept them - adding cost and delay.
LBMA-approved vaults
The LBMA also maintains a list of approved vault operators. These vaults meet specific security, insurance, audit, and physical standards.
LBMA-accredited vaults used by UK retail products include Brinks, Loomis, and the vault facilities at JP Morgan and HSBC in London. When a gold ETC describes its gold as being held “in LBMA-approved vaults in London,” this is the standard being referenced.
For investors using a vaulting service, choosing one that stores gold in LBMA-accredited facilities provides confidence about security standards and audit trails.
Responsible sourcing
Since 2012, the LBMA has required all Good Delivery refiners to comply with its Responsible Gold Guidance - a framework for ensuring gold is not sourced from conflict zones, does not involve human rights abuses, and maintains chain-of-custody documentation.
This matters increasingly for investors with ESG considerations, and it underlies products like the Royal Mint Responsibly Sourced Physical Gold ETC.
Tax and regulation
VAT: Investment gold (including Good Delivery bars meeting the 99.5% purity standard) is zero-rated for VAT in the UK.
HMRC investment gold definition: HMRC defines investment gold to include gold bars of a purity of not less than 99.5% produced by a refiner on the LBMA’s Good Delivery list. This aligns closely with the LBMA standard.
CGT: Gold bars - including Good Delivery bars - are subject to CGT on gains when sold. The CGT exemption available on Sovereigns and Britannias does not apply to bars.
How people use this information
Most UK retail buyers don’t need to reference the LBMA directly. What matters in practice: buy bars from LBMA-approved refiners (Baird, PAMP, Royal Mint, Valcambi, etc.) and store them in LBMA-accredited vaults if using a vaulting service. Both conditions are met automatically when buying from major UK dealers and using their recommended storage.
The LBMA standard becomes directly relevant when evaluating whether a specific vault, bar brand, or storage service is credible.
Frequently asked questions
Does it matter which refiner’s bar I buy? For resale purposes, yes. Bars from LBMA-approved refiners are accepted at near-spot prices by UK dealers without requiring additional verification. Unknown refinery brands may be subject to assay before buyback, adding time and cost.
Are Royal Mint bars LBMA Good Delivery? The Royal Mint is on the LBMA Good Delivery list. Their bullion bars (1oz, 100g, 1kg) carry the Royal Mint hallmark and are widely accepted by UK dealers.
What is the difference between LBMA and COMEX? LBMA governs the London OTC physical market - the largest physical gold market in the world. COMEX (Chicago Mercantile Exchange) is the main US futures exchange for gold. Different market structures: LBMA is primarily a spot/physical market; COMEX is primarily a derivatives market. Both contribute to global gold price discovery.
Can I visit the LBMA? The LBMA is a trade association, not a public exchange. Its offices are in London but it doesn’t operate a public market floor. The Bank of England, which stores the UK government’s gold reserve and provides custody for some LBMA members, does offer occasional public tours.