@ PMC
"we're also facing record petrol prices of around £0.83 per litre"
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This hit me about 15 minutes after I read your post.
1 gal = 3.7854 ltr
My Buick holds 18 gal = 68.1374 ltr
My van holds 30 gal = 113.5623 ltr
At UK prices
68.1374 ltr x .83BP = 56.55BP = $103.60 to fill up my Buick.
113.5623 ltr x .83BP = 94.25BP = $208.05 to fill up my van.
At these prices, I would be riding a Moped.