the incidence of fuel exhaustion accidents is no higher in the UK than in the US.
That could be simply due to the typical UK GA mission profile, which due to the severely crippled utility value in UK GA (airports closing ~6pm, lack of IAPs, etc etc etc) comprises mostly of short local burger runs, on which fuel doesn't matter unless you depart with practically empty tanks.
One only has to briefly dive into any US pilot forum and see the discussion topics there, versus the UK ones
It's a different universe.