Originally Posted by
stifle
If they're separate tickets and you have checked bags, no amount of assistance will help you as that is an impossible connection.
Otherwise, contact BA's "You First" service on +44 161 448 3013.
Thanks for the BA's "You First" number. We will definitely call ahead to arrange someone to guide us through T3. It's a same ticket issued by AA and we will do carry on only. We will also try to do a standby on an earlier flight on EK if possible. But reading from all the replies in this tread, it seems people have been able to transfer from T3 to T5 within 40 to 50 minutes and given we are flying BA first, we can also use the fast security check on T5.