Of airlines flying/announced/pending for LHR this winter, they received the following for Summer 2021:
Blue Air - nothing
China Airlines - nothing
Loganair - nothing
Ukraine International - nothing
Spicejet - nothing
Eastern Airways - nothing
Vistara - nothing
Cargojet - nothing
Rwandair - nothing
The only airline to receive more slots in S21 than they had in S20 were Shenzen Air.