Wall Panels for a Bath->Shower swap later

Note these are Grant Westfield multipanels not AB Multipanels - AB Building Products are a large distributor in the South West. See this post. I am planning to use the AB Multipanels to line my bath alcove in the Little Brown Bungalow. So far, so good. However, I may want to adapt it to be a shower in say 10 years, and that the price of the panels is quite high at £145 or so for an 8x4 in the standard finishes before you even start getting into trims and fixings. I only n

This is what I am ending up using for this bathroom: Shower panels for 3 of 4 walls: Multipanel Classic range from AB Building Products. 4 x 4x8 Aqualock panels in Blue Eiger pattern, adhesive, corners, trims and profiles, and silicone. = £650 approx. (Actually £610) Bath 1600 x 850/700 L-Shower bath with Screen from Cheeky Bathrooms: http://www.ebay.co.uk/itm/172603618735 = £265 Taps / Waste Wickes Kuban bath filler: http://www.wickes.co.uk/Wic