i found this deal today in asda and the offer is online or instore nationwide , £1 a box (doesnt include green tea)
There are many boxes which have the 'try me for free' deal on them which is a bonus , they will refund you £1.79 even if you payed less for it.
Its simple and easy to claim,i have done so last month a recieved my £1.79 few weeks ago.
i never had this tea before until my posh uncle gave me a cuppa and since then ive been hooked! redbush & vanilla mix is highly recommended