Thanks everyone,
for your thoughts and advice, I certainly won't be rushing into things.
The top plate has an inch long hair-line crack coming in from one edge and a 4 inch chunk out of one edge which is up to 1/2" wide and has clearly broken off through some past abuse.
I dressed the tip of the horn, which had a compression bulge, presumably from landing on it's point.
Uncle Spike, you have confirmed my suspicion that this anvil is forge welded from several parts, namely the horn, the tail and four feet all appear to have joins with the main body. I promise I will be extra careful if repairs happen. Unable to post pics at this stage. Thanks again,
Dan :)