C'mon guys, 51 viewers and no one able to assit me or comment???

TBH it's not really a H&S issue in my opinion. Not within the realms of H&S law anyway.

Why not let them have it for home use? Why do you want to put them out of use? Seems a bit mean IMO.

I'll have a cross trainer if you've got one and I promise not to sue if I hurt myself on it!!!!

and I'll have the free weights!

Bluewater,
I guess that the lack of response may be partly due to there being few people who have encountered such a situation and a lack of any guidance and/or case law to clarify the situation.
Speaking from my position (Liability insurance) I know of cases where firms employing contractors/subcontractors have ended up embroiled in the aftermath of an accident. For example being jointly prosecuted by the HSE and then, in turn finding themselves having to contribute to the civil compensation claim.
But I do not think that helps in your case. There will be no formal contract between you and the persons(s) to whom you donate this equipment. However, it might be decided that there was an implied contract. Doubtful in my opinion but possible.
I think that could only arise if there were some defect in the equipment at the time of donation. I would suggest that if an accident arose from some defect in the manner in which the equipment was installed (presumably not by you!) then you should be safe from blame. Similarly, if at some later date there was an accident from some failure (in the equipment) or misuse e.g. due to lack of supervision or instruction in correct manner of use then again I would have thought that you should be “safe”. If for no other reason than the separation in terms of time and space… it was all long time out of your control. Remember that in order to a claim to be made against your there has to be an allegation of negligence. You did something that the reasonable person (in the same position) would not have done OR failed to do something etc.
So, make sure the equipment is in good order, maintained etc. Hand it over with all manuals, instructions etc. But secure a signature covering acceptance of all that you are handing over and accepting that you are not responsible for installation, future maintenance, instruction for users etc. It may be simpler to send it to the tip!
These are my views – I may be wrong and no doubt other people may have alternative views.
Phil

DNW - I may be wrong but I think the issue was not that there might be an injury that could be regarded as a workplace injury but that there could be liabilities under civil law.

Phil

Robert is quite right. Sell it for a pound "sold as seen", as many cars etc are sold. No comeback on the garage if the engine falls out two miles down the road!