Daughter-in-law Sophia captured this new Rolls in London’s Hyde Park Mews
on Sept. 24, 2011, attracted by the opalescent pink coachwork. But the plate is even more ‘tailor-made’ – in pink on brown, TTT 94! Can we take it to be KSA royal household plate? (see Comment from Cedric, below)
There are quite a few good arabic plates in central London at the moment (2011), mostly Qatari.
Europlate blog 
This plate has been around for a number of years on different Rollers in London. It will be a 1996 series registration but without the lead zero. Other TTT plates have also been seen in London so it is fair to guess it is a royal car kept in London.
Thanks, Cedric. Are there previous pictures of TTT plates in London – or anywhere? – Vic