Pier 6 at LHR has 4 A380 stands but they're not exclusively used for the Super heavy. They did have SQ, QF and two EK departures back pre T2 opening so the additional 2 stands were contingency as BA also came to use A380s out of T3. LGW had one A380 stand on Pier 6 for their one operator, but I think Gate 110 was part of the Pier 6 extension so change was needed?