You haven't heard of Big Fish Tuning that operate out of MSL and also in the North East?
Very well thought of with the AMG tuned cars in particular.
IMO MSL use third party BFT which is a completely separate company for their tuning hence to me is not classed as “in house” developed tuning by themselves. There are even tuners out there that have developed their own “in house” software specifically for writing remaps but these tuners are not based in the UK.
I am not looking to start any debate as we are all entitled to our own opinions.
As long as everyone is happy with their own individual tuning then that is all that matters.