Thank you all for your kind comments!

hcuk94 ... yes, that sounds like the same Agent. He served at Mildenhall for quite a long time.

AvidFlyer1990 ... yes, Sixt did indeed come up with some good prices when I was researching. But Avis/BA almost matched on price, and with my BA and Avis status there were several additional benefits [including extra Avios]

TravellerFrequently ... agree on the AA 'uniforms'. It seems as though they can wear anything they like so long as it's blue! I find they present a very scruffy appearance, and certainly the ladies don't do much in the way of 'grooming'.