i have just found update info on new 13a requirments as of jan 2013,
it still states that uk police clearence Documents executed outside the Philippines must be authenticated by the Philippine
Embassy/Consular Officials of the Philippine foreign service at the place of issuance or nearest to it,

and nothing about being notary public stamped, or
being leagalised by fso

http://immigration.gov.ph/index.php?...&limitstart=30