Just tried it here in Rayleigh, Essex using a Sony ICF-7600DS and I’m getting a fairly low flashback signal on 576KHz. It appears to be in a roughly north easterly direction, roughly in the direction of their community FM transmitter sited north of Burnham on Crouch…?? Could be wrong though.
Site of the Caroline Community FM transmitter
http://tx.mb21.co.uk/gallery/gallerypage.php?txid=1704
Terry