Umm visa for the UK, make sure travel tax is paid it used to be 16t most phill bought plane tickets should have paid (do check) then you have CFO stamp in passport.
Also make sure she has money for the airport tax i think its 750 pesos again best to check my memory not to good at present.
Make sure she keeps some coins or has credit on her phone to call both you while waiting to go plus family and friends.
Cant think of anything apart from to wish her a safe journey and you both much happiness![]()