1st thing that jumps out is the 07949, looks like a mobile number. Did make me think of Mifsud and his UK simcards - but that was apparently tied to an O2 sim and the 07949 numbers are tied to EE since Feb 2000.
https://www.courtlistener.com/recap/gov.uscourts.dcd.191592/gov.uscourts.dcd.191592.124.0_1.pdf
https://www.ukphoneinfo.com/07949-code-allocations
Mifsud was in London in May 2014 (https://rusemb.org.uk/press/1827). So abit outside our time window. But as per previous bread there was PapaD/Mifsud tie up at the the London Centre of International Law Practice, which isn't a million miles from where we have been looking. That was 2016 though.
It could also just be a UUID .. other london pics have used them i.e. Q# 1720/21