"cookie20" wrote in message
...

I'm from malaysia and am taking a flight from Singapore to London Monday
night on a British Airways flight which is operated by Qantas, arriving
at 0620 on Tuesday, after which I am scheduled for another British
Airways codeshare flight, Aer Lingus, to Dublin which is to depart at
0750. That leaves me with at most 1.5 hours to move from terminal 1 to
terminal 4.

Do I have enough time for that???

You should have, the baggage can be checked through and
immigration is usually pretty quick.

Dont worry , even if the worst happens and you miss the flight
BA will put you on the next plane and there are several flights a day

Keith