Just a tip - I have long ago given up on sexy bras and when I ent for the more matronly and supportive type (sadly they are bras for comfort) I wasn't sure where to start. M&S were ok, but when I travelled to visit my son I went shopping. The JD/HJ/TJ? Hughes store in his town had a whole section of what looked like very supportive bras, well made and cheaper than M&S and others.
I am sorry I cannot remember the name or makes but Triumph featured as well as others and they came in a whole range of sizes. I have a broad back but smallish bosums. Getting a 40 A or B cup is pretty impossible - they seem to offer C cups going through to DDs and Es....so small chest me is at a loss! However, that Hughes store - I really cannot remember the initials and cannot be bothered mid post to look it up - had a fantastic range! I bought three very comfy bras.
Oh and Lemon I totally agree - there is no such thing as a comfy bra. As soon as I get in I unhook, and have, now I'm retired, been known to go out braless of late! 