Thanks for the advice guys, to the helpful chap who recommended Google, its easy to use google is you use the correct terminology! if not, you get a load of useless info back, hence the post!
It is a treadles jobby, and I was simply wondering if hacksawing was a 'normal' practice, it seems it is, so off to get a new hacksaw blade now, hopefully be riding by the weekend
also cheers for the tips, will come in handy, as you say cut too short and thats a useless pair of forks right there.