Originally submitted by robot1000 but it has expired.
Just use the attached 15% voucher to bring it down to £110.40 and then use the Tomtom Cashback promotion to get £20 back.
15% voucher code is WEBS2599
Quidco also tracks as £5.79
Total net cost (inc. quidco) = £84.61
M&S also provide a 2 year guarantee which is an added bonus!