Not Exactly Allies — Kathryn Judson

The Hughs, Leandre Durand, and colleagues, are up against murderers, moles, traitors, communists, and other criminal mayhem. Meanwhile, the team must contend with a doctor who was shoved out of medical practice, suspicious local law enforcement, meddlesome psychologists, juvenile delinquents on both sides of the channel, football players, and an immigrant community that would rather be left alone. And... well, who ever thought that an undercover agent's life was going to be easy? Third book in the MI5 1/2 series. Sequel to Not Exactly Innocent.