I just wanted to say thanks guys!
I've learnt more in the last few days than all the Googling, reading & talking to garden centres. The Phal is now sitting apparently happily in a south facing window, behind a diffusing screen. Remember I live in middle England & we have only just reached a weather condition above Arctic! My new Promenaea is showing signs of flowering with two small growths that look ivory colour & are bud shaped & pointed. my next addition to the terrarium is a Nepenthes Pitcher. It's a brand new cultivar, first shown at Kew Gardens (the UKs premier flower show) called Bloody Mary. I expect it to arrive today! I'll post a pic shortly. So thanks again.