Well ..My Mrs actually went and did it!!
She swore her oath of alliegance to the Philippines in the notary public (R.P embassy) and is now a Filipino citizen once again.
She is now allowed to get herself and the kids Filipino passports.
The consul advised her to use her new Fil passport when travelling to the R.P and her British one when returning to the UK.
Duel citizenship costs.. £35.00 for her and £18.00 for each child under 18 yrs old.