Hi there
I also have guttate p. I use Oilatum in the bath, and I also use eucerin with 10% urea as a moisteruiser, its really good. If you havent already, you might want to consider getting a prepayment certificate then you can get everything you need on repeat prescription, otherwise it can become very expensive when prescriptions are £6.65 a piece. PPC is currently just under £40 for 4 months!
I've had UVB and PUVA, found UVB worked best. Elocon steroid is good for the scaly spots, but cannot use all the time, I alternate with silkis ointment (non steroid).
Hope this helps.
Katie x