ba.com is a bit more forthcoming than before.

Summary
A British Airways Boeing 777 aircraft has been involved in an incident today at Heathrow airport. The aircraft was operating as flight BA38 from Beijing.

Cabin crew safely evacuated all 136 passengers from the aircraft.
Three passengers have sustained minor injuries.

The airline has activated a telephone line for anyone who believes they may have friends and family onboard.
The number in the UK is 0800 3894193.
Callers outside the UK should call + 44 191 211 3690.

To avoid unnecessary congestion on this line, only people who think they may have friends and family onboard flight BA38 from Beijing to Heathrow should call this number.
Customers wishing to contact the airline for general information should not call this number.
The number for general enquiries in the UK is 0870 850 9850.
Contact telephone numbers for British Airways offices worldwide can be found here


More information
IMPORTANT INFORMATION FOR CUSTOMERS TRAVELLING TO AND FROM HEATHROW ON 17 JANUARY 2008

Customers due to travel this afternoon should check ba.com flight arrivals and departures information for the latest information on their flight status.

Customers should not travel to the airport unless their flight is operating.
Customers due to travel this afternoon who would like to change their travel plans can do so by calling the airline on 0870 850 9850 or their local British Airways office.

Customers whose flights have been cancelled or delayed can click here for more information.

Probably best to check at ba.com and/or by phone.

Good luck.