Scout Hut renovation and access/entrance question regarding wheelchair use

Hi all,

I'm involved in the local scout group who are planning do carry out some building work to improve the hut where we do activities, have meetings and so on. Part of the work will involve renovating one of the toilets to make it disabled/wheelchair friendly and we also need to alter the entrance(s) to make these wheelchair friendly too.

I'm hoping someone may have some advice regarding what provision needs to be made for wheelchairs in terms of building entrances. Do we need to have two wheelchair friendly entrances/exits so if one becomes blocked there is an alternative? If so, do both need to be fitted with ramps and handrails etc. or is one ramp for the main door sufficient? 

We currently have a single main door at the rear of the building which is too narrow for a wheelchair and there is a step down too, and a double door in the middle of the building at the front which is wide enough for a wheelchair but is an an awkward place to change to being the 'main' door. So the solution would appear to be that we widen the back door to 900mm and fit a permanent ramp up to it, with hand rails etc. There's not a lot of space back there though. The double doors would be the alternative access/entrance in an emergency as the step down from them is only a couple of inches. It could be 'bumped down' if absolutely necessary.

Any help or pointers on where to go for proper regulations etc. would be gratefully received. Many thanks in advance!

regards
David