ETOPS
I don't know where you get your info from but it's wrong unless you are talking about a completely different flight! BAW88 landed at Heathrow, not LTN.
It was 15 miles south east of Biggin and informed it had its EAT. The pilot mentioned that he was a bit tight on fuel but and that he would need an improvement in the EAT. The EATs were constantly being amended and BAW88 got an improvement of 8 minutes. (They weren't actually real EATs by then, they were around 12 mins delay).
This was still not good enough, the pilot reckoned he had about 5 mins to diversion, so elected to go to LTN (at this stage the Biggin controller informed the pilot that if he declared a PAN, he would get a priority approach to EGLL but was told 'it's not that bad') The diversion was duly arranged and he was vectored towards LTN.
The A/C never actually entered the Biggin hold, it carried straight on through with a bit of vectoring and a 2000' climb (from FL140 to FL160) to make sure it cleared LAM stack.
As he was nearing BKY, he was informed that he would be able to get a straight in if he wanted to go back to EGLL, delays were now less than 5 mins and he would be given priority.
Round about this time he called a PAN.
He elected to try EGLL, and was being positioned for a straight in aproach. As he flew down the ILS (at about 9 miles), he declared a MAYDAY.
Landed at EGLL safely.
Reason given for being so short on fuel was that he was held down low for a while in Africa.
The reasons for things turning out the way they did will come out in the subsequent investigation, however I can categorically state it did not land at LTN!!
Apart from the exact point at when the PAN was called, the above is a very accurate description of events.