From what i remeber you need to go along on the correct day for uk visa holders.
Get there real early and speak to the guard. At the moment my expert on CFOs (the Wife) is away at the moment. But im sure she had to book in or obtain a ticket. The you queue up this will be real early, the Wife and a Tita of hers said in a nearby Hotel to get there early.
Your wife is then let in and the seminar take the best part of a day. Then you need to obatin the stamp and paperwork for the passport.
The latest details others will know but its best to take all the evidence you had for the Visa application in case you are asked for it.
Whatever you do don't try to fly with out geting the stamp. You may get away with it if the first leg of the flight is local or the airport imgration is not paying attenion. But it unlikely they will let you though most phils passports are checked by both the airline and the airport in great detail.
I have seen people randomly picked on for passport checks while going though the departure area of manila airport.
If you did manage to get out of the airport, it could possibly cause problems in the future if your wife wanted to fly in and out of manila.
