Gutted when I missed out on this tent a week or so ago. A good "codes" deal that was limited to a few lucky one who got it http://www.hotukdeals.com/deals/outwell-nevada-m-tent-127-99-at-mil/715932/#post9013180
Anyway - an excellent reviewed tent, that alone retails for around the £230 mark (see below for best tent only price), so this deal is like getting the front extension for free. (see the add banner half way down the item page). This is an instore offer only and therefore, no further codes available I'm afraid.
Other may still prefer the Millets deal with the tent at £199 less 20% with quid20 code and 10% more via quidco. £199.99 less 20% = £159.99 less 10% = £144. Millets don't seem to offer the extension - but that can be bought elsewhere for around £75 - bring the two deals within a fiver or so of each other.
Hope it helps some happy campers!