UK fuel prices: petrol 174.2p, diesel 199.1p — weekly review
The average price of E10 petrol in the UK is 174.2p a litre and B7 diesel 199.1p. Petrol is down by 0.4p over the week, diesel by 0.6p. Calculated across 8131 forecourts from the government Fuel Finder dataset.
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The average litre of E10 petrol at British forecourts costs 174.2p and B7 diesel 199.1p, calculated across 8131 forecourts nationwide on 17 October 2026.
What changed over the week
Petrol is down by 0.4p and diesel down by 0.6p. On a 55-litre tank that is about £0.24 for petrol and £0.32 for diesel.
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Among the larger cities Belfast has the cheapest petrol at 166.9p a litre on average, while Glasgow is the dearest at 175.9p — a gap of 9p a litre.
How much choosing the forecourt saves
Within a single city the gap between cheaper and dearer forecourts reaches 14p a litre, widest in Liverpool. On a full tank that is £7.70 — more than waiting for prices to fall. One forecourt in twenty sells petrol below 164.9p a litre.
Where these figures come from
We take the government Fuel Finder dataset — the scheme forecourts must report their prices to — and keep a snapshot every day. Neither Google nor Fuel Finder itself stores history, so the week-on-week comparison comes from our own archive. Snapshot of 16/10/2026 15:00:03. This article is assembled automatically from that data: every figure is computed, not retold.
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This article was assembled and published by software, automatically and without an editor: everything in it comes from open data and our own calculations, with sources named in the text. If you spot an error, tell us and we will correct it.