There are often deals to be had on Bargain Crazy...especially when there is a voucher to be had.
Found they are doing the Samsung Gear S2 for £149.99 - which is still the cheapest online: https://www.google.co.uk/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=samsung+gear+s2&tbm=shop
Adding code W20 will take 20% off making it £119.99 but add £3.95 for delivery.
If I needed a new smart watch I would definitely get this deal.
Available in white too.
Deal only available until this Wednesday.
Hope it helps someone.