Eeek. My advice....
1. Don't do it. The whole reason the market is in this mess is because 36K is not enough of a salary to support a 135K mortgage, particulalry with rates as high as they are (and they may get higher). Your salary should support a mortgage of 100K, plus your deposit which makes your price bracket around 115K.
2. I presume you considered the 5K in fees that you pay up front for the purchase transaction fees (lawyer, search, arrangement fee)
3. House prices have another 10-20% to drop again over 12-18 months. Target for the bottom is in line with prices as at summer 2004. Don't be swayed by the fact that prices have been going up in Scotland in the last quarter. 120K to 150K suggests you are looking at a flat and that's an area where prices are very much in danger of a big big fall. Just six months ago people in the South east of england were saying that prices might fall, but not in the South East. Look at them now! The estate agents windows are plastered left, right and centre with little stickers knocking 25K off the asking price.
4. Its your decision, but if it was me, I'd WORK, WORK, and SAVE, SAVE, SAVE. In one year, the market will be at the beginning of the bottom and the 150K flat you had your eye on will be up for sale at about 120K. You'll have increased you deposit from 14k to 20-25K (depnds on how hard you save!!), and suddenly you'll be able to buy that flat at good old fashioned traditional prudent lending multiples! You'll also be on the right side of the recession (i.e. maybe, maybe it will be coming to an end) and you'll know that your job is safe.
For what its worth I've bought and sold properties for 20 years, never made a loss, financed a 4 year sabatical on the back of it and for the moment am taking my own advice. I have my eye on a very nice commuter village where I reckon I can get a 550K house in about 18 months for about 425K.