Charlie, have you identified that you need both table and mitre saw? My experience of combined tools is they generally represent poor value for money.
I have no direct experience of the Wolf saw but it looks similar design to other brands at that price point, i.e. Einhell. I appreciate you are aware that the original RRP they quote of £699 is fiction, don't let the £450 saving influence you - its easy for all of us to justify tool purchases to ourselves. I'd question the interest that supplier will have once they have got your cash - be wary of tool suppliers that sell Jewellery.
That said, it's got a decent powered motor, decent safety mechanisms and a 10" blade capacity. I would email / call the distributor and ask for more details, i.e. amps rating of the motor (this will confirm the actual wattage), ask what it comes with and confirm warranty details, etc.
Factor in other costs, you will definitely need a vacuum / extractor of some form if you are working outside, else you will very quickly make a right mess of your garden. Its a given that the blade on that saw is going to be cheap and may not produce the results you are looking for - you may want to invest in a decent blade upgrade at some point. They also charge for delivery, small amount granted but when your on a budget it all adds up.
Going back to my first point, I would double check that you want / need both table and mitre saw capability. You could certainly buy a decent basic branded sliding mitre saw for that money and a decent low end site table saw would be close (they are also generally quite space efficient as they are designed to be folded down for transport). Even if you decide you want both, I would also question the convenience of storage of a combined machine comparative to separates. Combined machines always compromise in my experience.
Good luck.
