Thank you Annie, but the proof will be in the pudding. I'm guessing it will take quite a few days to load up with Estrogel, so it will be pretty nasty until then.
If the return of my symptoms IS down to reduced absorption caused by this bloody shower cream, then it does highlight how desperately I need this consistently high oestrogen dose. I hit 50 next year and had toyed with the idea of reducing my oestrogen but I simply won't dare risk it.