John
I have used BPT since about 2010 IIRC
I have used BPT since about 2010 IIRC. They have always been enormously helpfully in projects I have managed. Helpful in getting started and creating box office(s) for these various projects. Altho' I haven't checked their rates in recent years they were the cheapest (IIRC) among similar operations when I began with them. An added advantage for me has been the very helpful people in their Edinburgh office which is the city I live in and where I have managed the various projects. Well worthy of a 5-star review in my opinion.

