Actually not. I was at 120. Handover from Calais to Lille Approach, and then Paris. Then a (supposed) handover to London Control, but clearly not. Can't remember the freq. now, but it was definitely not London Info.
I was doing quite a lot of cross channel IFR at that time, so I was aware of the London Info gotcha. Flying a Mooney Turbo with oxygen, so no problem with the higher levels.