"As a suggestion they could look at dykes of earth with enough width to reflect upwards that frequency instead of diffracting round they need to be flat topped as well otherwise the sound will curl round over the top of them and the backside soft so as not to transmit."
Much like the 'Bund' at Lyneham then!
IIRC the Tri* does normally pushback and then start BATCO, depending on where parked at Braise Mutton; the VC10 parking was not always nose into the 'waterfront' so pushback was not necessary