In reply to Euan McKendrick:
Also £180, when the OP is clearly looking to not spend a big pile of money having proposed a £35 mat.
To the OP: worth looking out for a second-hand on, on here or on Outdoor Gear Exchange on Facebook. If not, An appkit one probably is the way to go - just not a waffa. They're really designed for keeping your shoes and arse clean for sit starts, or covering the gaps between multiple big pads. If you want to keep it cheap, the Phud is a useable pad. Not big nor luxury, but unlike the waffa or the bare ground will stop your knees taking the brunt of falling off. A Phud was my first pad around 8/9 years ago and despite having upgraded since, it was a good pad and worked well with my poor student budget.
Another cheap-pad option is a Psychi pad. I've never used one of these in anger, but lots of people seem to rave about them. Bigger than a Phud, but an extra tenner and currently out of stock.
An alternate option might be to try and find some new friends who already own pads and go out with them. This might also help develop your skills a bit. Or, some old friends who also want to boulder outside that you could share the purchase of a bigger pad with?
Edit: yes, a warrior is cheaper than similarly sized pads, but I'm guessing the OP isn't really looking at this category
Post edited at 11:50