Whilst I realise there probably aren't that many Pentax users here compared to Canon users etc. I thought I would post this for anyone after the WR 18-55mm lens as it is currently on offer with £60 off. Note that this is the better built DA version (notice the green ring) which has the quick shift focus and metal mount. The budget DAL version can be had for less if you get it split from a kit and is sometimes listed incorrectly as the DA.
18-55mm (35mm equiv. 27-82.5mm)
Metallic lens mount
Mount: Pentax K AF
Includes lens hood
Filter size: 52mm
Dimensions: 6.75L x 6.85D cm
The site gives the option for free UK mainland delivery at checkout.