If anyone is remotely curious about Paul Harnden sizing,
I'm a 46, and take:
For a relatively tight fit (41cm shoulders):
M in Blazers
S in long Blazers
For a coat fit (47cm shoulders)
S in macs (long and medium)
M in long coats
M in all shirts
This is for only recent seasons, older stuff fit pretty bizarre
I hear SS16 fits tight now though, so...
...so as a size 56+, I'm pretty much fucked. Good to know. Will re-orient. And cry at the loss of such beautiful fabrics and cuts in my wardrobe.