The ear infection has gone! Well, the vet (new one) said that it looked completely normal. Still concerns about ear drum, but that should heal in a couple of months. Saline ear cleaning routine dropped to twice a week. Hooray. That only took 6 weeks and 7 vet visits...
Re: Ear infection - gone! And she said no reason he can't swim! So looking forward to at least starting to have some ambition to not shame ourselves on a forum in the company of Sam, Millie, Ziggy and Alice... It's so funny, at first he was running into the sea to fetch a seaweed root (which we had randomly thrown, not really for him) but then suddenly, the next time, he wasn't keen. But he was so young, we'll see this weekend.