Originally Posted by
windowontheAside
Park in the long term car park at T5 right at the far end, near the 'E' bus stop.
It's right next to the business parking for T1-3 so on your return, take the business parking shuttle and then just walk across the boundary to the T5 car park. It's very easy - the two car parks exit lanes are directly next to each other in the same block, and as a foot passenger there isn't even a fence to divide the two, just a kerb.
100% can confirm this and I often do it. Just park as far East as you can in the T5 long-term car park. On your return, just get off the bus as West as you can at the T2-3 Business car park...and walk to your car in about 2 minutes.