The worst UK coaster incident was at Battersea in 1972. Five kids killed and more injured when the Big Dipper (a Scenic Railway) had the lift break and the roll backs failed. The train crashed back down into the station.
I think there is some truth as always to these rumours, it's just that the actual details get lost on people. This happened at Battersea, but in some telling somewhere, somebody says their best freind's cousin was at Weston when it happened. Then it suddenly become Weston where it happened.
I have heard decapitation tales from Blackpool from both the Wild Mouse and the Grand National. I'm sure there have been deaths (especially on the GN as it only got restraints in 1983), but I suspect that the grisly decapitation was on some coaster, somewhere, but has been attributed to most woodies since
http://www.london-today.net/web/events/ ... 61756.html
for the truth
Oh, and final nail in the coffin... The Battersea tragedy led to most of the UK wooden coasters remaining to be torn down. Inspectors were sent to them all, and parks were told to fix them, or get rid. As the cost of getting them up to scratch was too much - most went.
There's a kind of Dinosaur extinction of wooden coasters happened in the early 70's, and it's this coaster accident which sealed it. After that, there were very few left in the country (Yarmouth, Southport, Margate, Morecambe and Blackpool I think). All the rest were gone by 1978 at the latest. That's just so you get an idea of how big a deal that crash was. Anything of a similar scale at Weston would have been of major interest and been well known.