I drove to work today,i have not tried the method above since yesterday.
As i got to our , vast , carpark i undid my seatbelt and got my speed up to 15 mph again, lo and behold the chime started and the dash light blinked.
Why it didn't do it the first time i tried i have no idea, suffice to say it is now working.
Cheers to all who chipped in with suggestions, much appreciated.
1 litre Zetec Turbo petrol 74Kw / 100 Ps. as in my avatar.