BA 789 or BA78b

[roger]

I have booking on BA in J which shows the seat map in MMB as
https://www.aerolopa.com/ba-type-789

If it is 789 then it should also have 8 first class seats and AFAIK, BA does not seel first class on my flights.
Any possiblilities of finding if first class is available on my flight?

[SamG]

They’ll use the seats only if the CW cabin is totally full

They’ll usually select status passengers to sit there. Service is usual CW though