Thank you for comments. Have just picked up new tablets, they didn't have them in yesterday, I'm not going to start taking them until tomorrow first thing. As they will make me wee more, it makes sense to take them early morning - I don't want to be getting up at night any more than I do already! I'm making an effort to drink more water today, to get into the habit of doing it.
I made Jack Monroe's cake, exactly to her recipe and instructions....I did add the extra 5th ingredient of 2 tbsp. marmalade. Dead simple to make, one of the easiest cakes I've ever made. It cooked well, taking slightly longer than the 50 mins she specified - my oven isn't overly hot though, so that's probably why. It also didn't burn on the top at all, even though I forgot to put foil on it. Here's the finished cake, and a slice cut:-
As you can see, the fruit sank to the bottom and the cake above the fruit has a slightly unusual texture....it's quite springy and a bit kind of rubbery, not crumbly or cake like at all. However, both husband and I agree it tastes fine, very nice in fact, with quite a strong citrus hit from the marmalade. I will make it again, with perhaps some added dried cranberries, maybe some nuts. Not a fail at all, a perfectly nice cake, but probably more of an everyday cake than a special event one.