I don't know if all councils do this, but we had an advisor to come and discuss what we wanted. We weren't eligible for grants, but they had a list of approved plumbers, and would have organised it all for a fee if we had wanted.
We went for a walk-in shower, with plenty of handrails, and it's ideal. My husband has balance problems, and a seat didn't work, so I put two suction grips on the shower screen, and he leans back on the opposite wall. I wasn't sure about this, but he only uses them for balance, not to pull on. I reattach them on first of each month, and have had them for two or three years now with no problems.
He also has trouble with a push button toilet, and we couldn't have a handle, so we have a sensor flush, battery operated. Impresses the grandchildren no end!