I just return from a year of traveling in SE Asia and 10 GBP per day seems like really low. Transportation alone could eat that amount easily.
My budget was something around 20/day, which buys me dorms at nice hostels (no bugs, aircon and usually hot water), food at local restaurant (I usually stays out of hawker stalls), transportation and occasional sights (like Angkor Wat and such).
Lol, we didn't have any of those luxuries... Could only afford hotels in Cambodia (3USD per night for a double ensuite!), hostels everywhere else. Only had aircon a couple of times. Never had hot water (it's 30 degrees there all the time, I never needed it). We only had restaurant food occasionally, most of the time from street stalls, or peoples houses. We only had beg bugs in KL, but we had them for the full 15 days we were there, 5 different hostels...
PS: We got a 3 day tour of all of the Ankor Wat temples, including transport between them for $9 each. For anyone who's not been, they are incredible.
My budget was something around 20/day, which buys me dorms at nice hostels (no bugs, aircon and usually hot water), food at local restaurant (I usually stays out of hawker stalls), transportation and occasional sights (like Angkor Wat and such).