Mrs ExXB travelled LX to LHR a couple of weekends ago. Although still in Terminal 1 the aircraft uses T2 gates. She commented on the very long walk, poorly signposted, with not-working escalators and non existent travelators.
Will likely improve once LX finally moves to T2 but it is a real pain for their loyal customers.
By Motorway BRS is about 40 minutes further from her Dads's house than is LHR. With the walking etc at T1/2 she says it's quicker to use BRS than LHR, and often cheaper too.