So I've come back to my house after convalescing at my parents' place for a couple of weeks after the operation. This means I've finally been able to check up on the Old Ale. I wasn't too hopeful when I smelled vinegar after opening the fermenting bin. I was even less hopeful when I saw a whiteish film on top of the beer. Not to be put off, I took a sample and checked the SG (down to 1.010, which is good). Just to make sure all was definitely lost I took a swig from the sample jar. Disgusting vinegar taste. Disaster!
Oh well, I'll tip it down the drain and start the next brew (Geordie Mild).
On a more positive side, I brought the Wherry in from the shed and have drawn off a bit to see what it looks/tastes like. Pretty happy with it (it's a bit cloudy but I think that's just a chill haze).