Well, I think it is a sound investment, considering that the rent marked is pressed as the high prices indicate.
If you get a job which means you need to move to another part of the country don't sell... rent it out. The rent will pay your mortgage and then some.
The market will fluctuate and there will be a dip in the prices or interest will go up. When the real estate prices dip - buyers will grow and the prices raise again. The renting marked will grow when the interests raise. If you have the means, it is always good to own something.

The most sound advice when it comes to real estate is to build something new. If you build something that costs 300k (£), no matter what the marked says, you will at minimum get 350k for it if you need to sell. An appraiser will look at all the documents (bills, drawings etc.) and give it an appraisal above the cost of building it. This is not the same as asking price in a sales document. The asking price will be higher.
Unless you find yourself on Iceland and the **** just hit the fan and nobody can buy anything. You still have the option to lease it out.