Long connect at LHR; 2nd flight is to TLV, what time to get back to T5?
I am traveling next month DFW-LHR-TLV with my daughter. We have an eight hour connection through Heathrow (scheduled to land at 1pm on a Fri and depart at 8:55pm) and hope to head into London for a couple of hours. Assuming we do exit the sterile zone and head into London for a little bit, what time should I plan on being back at LHR (I am American Executive Platinum/OneWorld Emerald if that helps getting back through initial security)? I assume that there is additional screening for TLV flights and want to plan accordingly.