[202876]
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They charge you more? That's unreal! I pay £1 p/l where I fill up.Problem there ,at least for this area is marinas charge at least 25% more per litre than forecourts.
I have a 30l and 20l demountable which i take to the local petrol station to fill up , whilst saving myself £25 at todays prices .
I may be wrong but you used to be able to carry up to 333l as a private individual in a car without a license, and can put up to 500l in a tank in a trailer which powers machinery (providing everything is up to regulations)
I did try to look it up but its not that easy finding a straight forward answer on gov.uk
I used to know the petroleum regs like the back of my hand, but haven't dealt in them for donkeys years and they will have likely changed by now.
Nothing ever is easy on the government website.