We also used an Agency from Cebu called OLVIS who claimed to be experts. The only reason I agreed to use them was my wife convinced me she needed the support of someone who spoke her own language. BIG MISTAKE, they were absolutely useless and without me double checking everything they produced and correcting it we would never have got the visa. I think they charged us about £1000 for absolutely nothing apart from further complicating the process and introducing themselves as a third party which meant us travelling to Cebu several times to meet them in their offices.
DO NOT USE AN AGENCY...... IF YOU ARE WITH THEM ALREADY DITCH THEM NOW. Just use the advice you can get from lots of people who have already done it here on this forum OR alternatively use a British Immigration advisor that has to be registered by law.
Just remember your getting a visa to enter the UK so get advice from someone who knows UK immigration law NOT a philippine or American agency. I made the mistake but please dont repeat it!
http://olvis.com/uk-british-visa/ AVOID THIS SITE AND THIS COMPANY LIKE THE PLAGUE!