Right. Before anything else, look at:
http://www.betterbybike.info/
Get in touch with them, particularly the roadshow team. Ask them if they can put you in touch with any of the other Bike User Group (BUG) leaders in businesses around Bristol or offer any other help. They have contacts with the local police, council etc etc as well as a few bike companies.
I’d heartily recommend speaking to the guys at HP who are just off the ring road at Abbey Wood (ask betterbybike if they will do an introduction). They have what I’d say was the very best setup that really works. They had some good support from their management and have done wonders. They have a fleet of bikes, a couple of electric bikes ,tools, emergency repair kits in the office etc etc.
Don’t buy some random bikes or anything else before you have plundered the massive wealth of information and support that Bristol has to offer. I was the ‘Cycling Champion’ for one of Bristol’s biggest employers until Dec so what I’m telling you comes from experience (and envy having seen what other companies will do to support cycling). BBB can really help you on your way and they are lovely people.