For comparison the bottom of the 2014 Boardman range (the hybrid sport) has a square taper BB.
Mine did over 2k miles with no maintenance, including UK winters and Singapore rain, and it was neglected for 6 months to rust at 30c/90% humidity without seizing up.
It’s heavy af though, and the drive train never shifted cleanly even when new, so there you go.
The frame is now back in the UK and has been fitted with a surplus hydraulic Ultegra group set and drop bars. Looks very wrong, goes very fast :-D