Thanks everyone for your responses and ideas.
I had been thinking that this summer would require a cooling mat and pillow. I'll definitely get that organised.
Thanks for the anti-depressant suggestion. My oncologist had put my on low dose Effexor for hot flushes and they certainly didn't have a dual effect of impact my sleeping nor did they do anything for the hot flushes. We swapped to Gabopentin and they had an impact, well until the Zolodex injections amped things up again.
Back to hospital for my reconstructive surgery in a couple of weeks. Maybe the time off work will enable some better sleep hygiene (as my oncologist keeps calling it) to be developed.
Thanks again.
Stephanie