I wouldn't worry about the DA-20. Our friends at FRA will always have one ex-mil pilot up front, and an ex-mil nav down the back managing the squiggly amps stuff. Flying with loads of FJs simply won't phase them, and they are rather good at looking after themselves...
TLP will NOTAM missions all over Europe, and then pick the area with the best weather on the morning of the mission. In my experience, they only pitch up to the UK about once every five times the NOTAM appears.