My general approach to DIY is money. I go to Homebase, I buy some stuff, and I hope that that does the job. Actually fitting what I've bought seems unnecessarily involved, if you know what I mean.
It seemed to be working this time, though. By the time a free weekend arrived, the flush was working again, and the replacement unit's been sitting in the car boot, untouched. Until, of course, this weekend, because I had people round for the evening, and spent much of the day preparing.
So I'll have to look into that, today.
But while I'm building up to that, no less than three bulbs have also decided to blow. One of them even took half a minute of flickering first, as if it was laughing about it.
I don't think I dare put the washing machine on today.