I noticed that the RSPCA policy on feral cats doesn't appear in searches because it's in a PDF document, so maybe it would be of interest to post it here.
The policy says:
We don't get huge numbers of requests to trap and release feral cats, more a recurring trickle, but it is quite time-consuming, because several journeys are usually needed for each cat trapped.
The policy says:
"The RSPCA recommends that, where the welfare of feral cats is ensured and their presence is accepted by the owners of the site, the animals should be humanely trapped whereafter veterinary advice should be sought regarding their health status and attempts should be made to rehome very young kittens or other cats which are not totally feral. Euthanasia should be carried out on those cats which in the opinion of the veterinary surgeon are seriously ill or which are injured to the extent that returning to the site would result in continuing suffering and the remaining cats should be neutered. While under anaesthetic for such neutering, the left ear of the cat should be "tipped" to enable the cat to be easily recognised as having been neutered and the neutered and identified cats should be returned to the site and any further suitable advice given.We need more volunteers who would be willing to help with trapping and neutering cats. You would need to have the use of a car and to be fairly physically fit as the traps are quite large. If you might be interested in helping, please email rehoming@rspca-cambridge.org.uk
The treatment against fleas and round and tape worms of all cats selected for rehoming or for neutering as above is considered necessary.
"Tipping" means the removal of 6 mm, by a straight cut, of the tip of the ear.
The RSPCA recommends that, where the welfare of feral cats cannot be ensured or their presence is not accepted by the owners of the site, the contact should be told of the RSPCA policy given above and be given the opportunity to reconsider. If this fails to resolve the problem, or where the presence of feral cats cannot be permitted because of legal reasons, the RSPCA recommends that all cats are humanely trapped, treated and neutered, then rehomed or re-sited wherever possible, or humanely euthanased.
The RSPCA cannot guarantee that animals trapped by pest control firms will be destroyed in accordance with methods approved by the RSPCA."
We don't get huge numbers of requests to trap and release feral cats, more a recurring trickle, but it is quite time-consuming, because several journeys are usually needed for each cat trapped.
Cats Protection will also help with neutering feral cats if they can. Click here to see their policy.