Hi Ed,
I'm a size 18/20 (38F to 40F) and I have got lots of lingerie from Curvaceous Beauties' website (
Plus Size Lingerie UK Store | Lingerie Nightwear - Curvaceous Beauties )
Definite thumbs up on their frilly knicks. Their sale section is good and they deliver pretty quickly.
M&S have often got cheeky bra and knicker sets that are too good to say no to and their size range is good.
Ebay is always worth a look. I got some fab satin french knickers for £5 and a few sets of nipple tassels.
Also....in case you missed the posts....New Look have got some frilly knicks at the moment. Size 18 fits me - room to spare.
Happy Shopping xx