Originally Posted by
all ahead full
Are you on separate tickets, or the same ticket, as if on the same ticket, you should tell someone, as it would effect the other person.
No it won't - as previously stated several times - affect the OPs colleague flights.
Every individual has their own ticket even if it is part of the same PNR as other peoples. The two passengers may be on the same PNR but that is not the same as being on the same ticket
There is no need for the OP to tell anyone.