According to routes online Air India will move the BOM service to LHR in S20. The Amritsar flights look to be open for reservation up until the start of W20/21 season, however the rest of their network is open until S21 so it’s not looking good for the ATQ route either. I hope AI do stay at STN they seem to be popular and their fares to ATQ aren’t cheap!
Some good news, SAS will add seasonal flights to Lulea for next winter, flights will operate Monday and Fridays onboard an A320 Neo. Flights start 18th December.