Hi Andy, I've got a Lifesystems " OUTDOOR " first aid kit. It's quite a comprehensive package. Comes in a red zipped case, contains what you would expect in an emergency kit, the usual plasters, bandages, tape, anti-septic wipes, scissors, tweezers and in case you have overindulged the night before a box of paracetamol. The shop I got mine from carried the full range, from the very basic kit up to a kit that I can only think would have to be bought by a paramedic.
I checked out most of them ( not the paramedic one ) and I reckon the Outdoor one is about the best of the bunch.
Hope this helps you.
John.