Russian CAA have stopped all TU154B flights after recent Kogalym Avia TU154B accident. Not sure what's the status now.
TU154M are permitted to EU/UK. I remember Atlant Soyuz flew to Luton in December with their TU154M VIP with a Russian football team (Spartak I think).
The only issue they had was a late night departure (may be something else that I'm not aware of)
Pulkovo / Rossiya Airlines used to fly to LGW with their TU154M before they got B737s and A320s. Even after they got B737 they were using TU154M sometimes.