Southwater is expensive. Too many monied people on the Down Link with large incomes. Also, they are the only Cannondale workshop/dealers between S costs and London (or were), as I discovered when they serviced a Headshock for me - and I also discovered some "serious issues" with their efforts.
I'm sure you can get something of far better value more locally.
I'm sure you can get something of far better value more locally.