Dunno if it was mentioned before but out of curiosity......... Bearing in mind Heathrow usually has 20 or 30 knots on or near the nose at a thousand feet for that end, it's a pity it wasn't an Airbus instead. Groundspeed mini would have thrown on more than a few knots at a thousand feet through into late finals and an Airbus suffering similar fate might have made it to the runway.
Don't think the 777 has and Vapp additive does it?