Leasehold is virtually unheard of in Scotland since Property Reforms in 2012.
Freehold covenants, although interesting - mine are fascinating - are timely and costly to attempt to enforce.
OP's Residents' Committee is on the case and if the AirB&B licensee has contravened planning that may offer some scope to act.
I live in an area with an acute shortage of housing, we have Airbnb properties here and people would love (and need) to have them as permanent homes. Permanent homes should come before holiday homes, l really can't see any moral argument against that.
What are you avoiding doing in this heat?

