Gary
Sorry to hear that you have lost your anchor, all of us that fish the wrecks have done it mate.
Although I have never had one I am led to believe from good sources that a delta anchor or even a copy hold better than the Bruce and its copies.
chain must be at least as long as the boat and a fair bit heavier than the anchor if lifting with an Alderney ring.
Quay West chandlers here at the Yacht Club are a good source, ask for Club discount and Peter will look after you. 01202 732233
Charlie