I know Tattle isn't limited to posters from the United Kingdom but I would hazard a lot of us are. This is a really useful resource:
It is for NHS Scotland but I am in the East Midlands and we have the same stock here.
Just be aware your GP may not be aware of different copper or hormonal coils. My old GP actually fitted Mirena and although she was aware of the lower hormone Kyleena and Jaydess she didn't know what they were called and referred me to the sexual health clinic (who did know)
I was fitted with a Jaydess in September 2020 to try to find a middle ground between the effects of progesterone (e.g low libido) and the period pains of the copper as I already suffered with bad periods.
I bled constantly for 3 months with the Jaydess. Then the bleeding settled down but my sex drive has tanked and I'm a lot more tired than I used to be.
I discussed with the newer and much better GP and although she was reluctant due to my menstrual history she ordered me the smallest copper coil on the market, the TT380 Slimline Mini. The TT380 Slimline (no Mini suffix) is the same size as the standard US Paragard which lots of people complain about. There is some evidence (behind paywalls) that smaller copper coils can give a reduction in the typical copper coil symptoms of pain, heavy bleeding and expulsion. One was a practice review from a UK sexual health clinic and the other was a blind Mexican study with their standard and Mini equivalents. I also believe Canada and EU countries have a Mini copper coil too under various names.
Due to strings going walkies I couldn't have the Jaydess changed in April 2021 but as of today the Jaydess is now out of me (the strings reappeared)! The copper one will be fitted in September. Even if I go back to my old heavy periods I will be happy to feel like I have my mind back.
Just thought I would share this for both sides of the debate that there are more than just two options for those in the UK.