hiya,
Just a couple of points
Think very very carefully about the mortgages with 5,6 and yes, even 8 times multiples of your salary. The repayments can (and probably will) be a very large chunk of your take home pay, leaving you with substantially less disposable income. Whilst they are a response to the UK's stupid property prices, it's debateable getting yourself in such a comparitively large amount of debt to your salary/income.
Also, there is this common misconception of rent money is 'dead' money or being thrown away - it isn't, just as onetiger says, sometimes it's best to pay rent if a possible move or career varaiance, situation variance can or may occur. The amount of 'rent' you pay could in some situations work out less than what you'd fork out if you had bought your own place. The only time its money 'thrown away' or 'dead money' or 'just paying the landlords mortgage' is when your means are enough to have your own place but a) you dont realise it and b) can't be bothered to buy a place!
So don't feel bad about renting in the interim, until you are ready and capable to buy a place, you are doing what you need to do and hopefully putting away cash towards your long term goal of buying.
Cheers!
DtM! West London & Slough UK!