I have been getting shirts made from Sean for about 1.5 years now. I had previously gotten shirts made from a bespoke tailor who took periodic trips from Rome to London. There is no comparison. The way it works is this: a shirt will run you about GBP 160 and there is no minimum. Sean will make a first shirt, which will most likely not be perfect. Then based off the shirt, he will make tweaks for the second shirt until it is perfect. For instance, I wanted a more interlaced, stiffer collar, so he changed that, I also thought the waist could be taken in more. I now have 10 shirts, and they fit absolutely perfectly. It is basically impossible for me to buy shirts OTR, as I have broad shoulders and a slender waist. And the shirts seem to fit better as time goes on. Sean only buys the best cotton from Switzerland and Italy. Sean is located within Meyer Mortimer on Sackville shirt, which is a pretty interesting old school location in and of itself. Sean is also a really nice guy who likes to explain his craft to people that listen. I've sometimes just dropped in and chatted to him about shirts in general without buying anything. He'll happily give you advice on collar type and fit as he's obviosuly seen everything.
The only downside is that the shirts cost a lot. They will run 160-200 GBP, depending on fabric. Obviously that isn't for everyone but for me, it's totally worth it. Also, it may take 2 months to get a shirt made, but you can also ask Sean to hurry up the process if nescessary. read more