You can spend many an hour perusing this site and its links. This is a good port of call if you would like information on historic ships - both merchant and military. Great site on a rainy day in the winter. If you own a Westerly then you will almost certainly want to get the benefits of belonging to this group. The association have a good relationship with Westerly and provide some very useful information on the range of yachts which have been manufactured by this company.
Good discounts are available to members.
The Royal Naval Sailing Association is for serving and retired members of the Royal Navy. It has a world wide and extensive membership who keep in touch via a regular newsletter. Visiting foreign ports can be made so much easier when you can put your finger on the name of someone with local knowledge. Well worth a peruse. Interesting 'Learn to Sail' scheme on-line.