try the @o2 #o2priority 24hr #poundie challenge
if you found the o2 o2priority "three freebies in 15 mins" challenge too hard why not try the o2 o2priority "24hr freebie and poundie" challenge ie how many free, £1 or 50% off items can you buy in 24hrs
for example you could try and get volvic, pizza & milkshake
https://www.flickr.com/photos/osde-info/21030651072