"Roland Perry" wrote in message
news
In message , at 06:33:27
on Thu, 29 Dec 2011, remarked:
but why will the majority changing flight go land side in the first
place

How else do they change terminal?

By taking the airside transfer buses and using the infamous "Connections
Centre" to be re-screened.

Much fun for all the family at this stupidly long url:

http://www.heathrowairport.com/heath...-guide/flight-
connections/connection-guides/international-arrival/international-
departure

Where (eg) T4-T5 is timed at 105 minutes. No wonder some people think
going landside will be quicker.

But that includes 30-45 minutes for queuing up for security/waiting in the
far lounge

You'd have to allow this time if you went on the tube.

The actual transfer time, including waiting for the bus is going to be 30
minutes or less. I doubt that you will better this going land-side and back

tim