Just ordered a second one so am now willing to share.
They are hidden in the kids uniform on the web site. They go up to 41/43 in chest. Only in Grey, Navy & Black But they are 100% Merino wool and they are only £19 !!!
Discovered during hunt for school jumper for fussy teen.
I have never come across merino wool so cheap. They are lovely & soft with plenty of room. Think i'll order another