Advice regarding a large Phal Orchid

[nickynackynoo]

Hi Guys,

I've just been handed a rather large Phal (?) which hasn't flowered for a few years. It has added several sets of leaves & shows signs of adding another at the moment. I have placed in an east facing window & just soaked it with a dose of rainwater & orchid fertiliser.

Can anyone give me some advice as how to get it into flower? I have also attached some pics in case these help.

Thanks guys (& girls) in advance.