Hi,
There may be some details here
DISCUSSION for Hilton Honors Hotels in or near London, United Kingdom {GBR} - FlyerTalk Forums
but I liked the Bankside Hilton, good rooms, very good breakfast, good lounge and nice swimming pool in a good location
An excellent review of the lost property st paul's is here
Lost Property St Paul's London - Curio Collection by Hilton {GBR} - FlyerTalk Forums
Regards
TBS