Advantages of a more expensive bike?

[LSAF2011]

More money is probably a better gear set and less weight.
For £999 you could get http://www.planetx.co.uk/i/q/CBPXSLPRIV13/planet-x-pro-carbon-sram-rival-road-bike
Another £200 you could get the same bike with Ultegra gears. Bike weighs in at 7.75kg and goes like you-know-what of a shovel.

Recently got my bike after asking similar questions about the gears, all we're very helpful, thanx.

The bike is freaking awesome, very light, very fast (good engine) and the gears are very smooth, I would recommend you can to go to the shop, have look, get sized, etc., if you can.

I did mine on the C2W scheme, if your work doesn't have one of these then they can register at https://www.cyclescheme.co.uk/employers.