Final update. Ilford reprinted the full 2 sets and sent a letter of apology and 2 vouchers for �3 each. However, no explanation about the scratches or the wash out that goes all the way to the perforation, at least not from them. A friend who had a look though it was badly mixed chemicals. Another though that it could be light leak (all photos featuring these were taking in bright sunlight).
The camera is still suspect, of course, which is a shame. I may be able to take it out in bright sunlight in, um, say 9 months. Ilford probably go in the bad books, as they don't come cheap either; Jessop's were suggested as a possibility. I have two more prepaid Ilford envelopes, which I will use together with the vouchers (pushing costs and perhaps slightly larger size). Thanks for listening, Kostas

