Ian Barber.... We had one at Heathrow. All we have in the records for "The Book" is that he was an ATCA at Heathrow "in the 70s".
Ivor Sims... If it's the same... was at Heathrow 1976-84 thence to EGJB and returned to Heathrow Tower 1994-2004... thence to TC where, presumably, he is still incarcerated.