This isn't just recent Mat, it's been going on for 40 years. Oil price goes up, fuel follows it.
Oil price comes down, fuel price goes down about a 1/4 of what it went up. This has happened steadily, every time, except for when there was a picket on the petrol refineries by motorists and truckers, that time it came down the full amount of the previous increase.
That's how fuel prices have rocketed away from the US and Europe in general.
Successive governments have continued to milk the cash cow and this is mainly why transport and production costs lost us millions of jobs, as the work went elsewhere, in fact anywhere where companies weren't strangled by high fuel costs. The 2 other things that are out of proportion are property and food, property also contributing to the former. You only have to look at the vast profits that are made in those areas, to see where we get the title "rip off Britain"
Rant over!!!
Great pics those FT. Yes they were Villiers strokers of the size you said, the 350 becoming the norm in final production.
If you run a stroker on paraffin, you can't add much oil, or it won't light. Therefore all the oily bits start to scream (literally) quite quickly