I've been to a number of pubs in Alabang too, lots of expats about there. Jake ........ does the Union Jack Tavern have a shop attached to it in the shopping mall selling things like tea, teapots, etc. ? If so, I have been there too.
My brother's "local" where he regularly ate English food was the Australian pub in Alabang and also the San Mig pub but I don't know whether they are still there today.