We're back from our trip to Portland, Weymouth and I successfully completed the PADI Advanced Open Water Diver certificate. The qualification is meant to prepare you for diving up to 30m. Unfortunately, Jenny wasn't able to do the course.
A big revelation for me was that it isn't cold diving in the UK at all but the water was very murky as expected. I would like to dive in Cornwall some time in the future as I gather the visibility is much better. I've written up a travelogue of the diving trip if you want to read all about it.