To cover myself, so that people don't come up to me accusing me of not telling them the dangers of old buildings, I will do my own legal disclaimer.

Whenever I visit such sites, I always consider the risks possible. It is my decision to visit old and dangerous places. I do not advocate that everyone should go out and check these places out. If you do go to visit these places, I do not take any responsibility for any fate which may befall on to yourselves. You know and understand the risks, and should be prepared to take the consequences.

All I can say, is that if you do go to these places, go with someone else so if you get into problems you can get them to get you help. Carry a phone to summon emergency services if need be. Carry a torch so you can see your way around. And have suitable protective clothing and headwear to avoid getting any serious injuries. If you do happen to cut yourself seriously- stop and think. I am not a doctor, but do have sufficient training and knowledge. Are you up to date with tetanus shots? If not, you seriously need to go and sort yourself out at a doctor's surgery.

Most of all enjoy yourselves!!!