....and another thing.
My waterpoof jacket fulfilled it's description.
My phone, safely stowed in a waterproof pocket.....The waterproof pocket did just that - kept the water inside the pocket, and hence into the phone.....which for some reason failed to work
It's been stripped down almost to it's component parts and has spent most of the day on the radiator.
Now re-assembled, it seems to be mostly working. I am now backing up all my contacts and photo's! Strange how that sort of thing concentrates the need for regular back-ups!
Mike