Hi,
Laptop has been stolen 3 or 4 years ago, and I guess as the Police did not returned my call that it wont be recovered 
So there is almost new (used like 1 month) power supply for Dell XPS M1730 (may work with others, depend on the socket/plug).
It is exactly the same it one under that url.
So it is free, the only condition is small donation to London Air Ambulance.
Collection from East London, PM for details.
Regards,
R