Sorry but I don’t often visit this forum and have only just seen your post.
What you are looking for are called “Impaired Life” annuities. You can drop your old pension funds into these and the insurers pay a higher monthly pension rate because your life expectancy is shorter.
You can tailor these to your needs in terms of: fixed or increasing payments, widow’s pension etc. Obviously the more commitments they take on the lower the monthly rate is that they will offer.
I used Annuity Direct a couple of years ago and can personally recommend them. I first used them in 1999 so have a lot of experience with them.
https://annuitydirect.annuityquotationportal.co.uk/
Basically they will work with you to work out what funds you have and then get multiple pension funds to make offers of what they will pay you.
Hope this helps