don't forget to keep boarding passes from your flights safe in your money belt.
take loads of photos of you together,
don't wear any jewellery or expensive clothes, that just makes you a target. be 100% streetwise, try to blend in (impossible if your a 6 feet)
and a must that i learned NEVER pay a taxi driver whilst sitting in the car and leave your luggage in car then jump out (take bags out first then pay taxi driver) he drove off !!!
change big notes in shops (like minimart or shopping malls), so you have plenty of coins for jeepneys/buses.
exchange your sterling money in phils, you will find many moneychangers in areas like Ermita (you will get a better rate than england) but make sure you have some peso's to get you traveling from airport. take a few ATM cards (emergency money) not all mine where accepted in machines.
regards martin