There are a few good (well, less expensive) deals on the range at the mo- a 105 Caledonia can be had for £2500 (
Sigma Sports, Wheelbase and others also have discounts on various models)
https://www.westbrookcycles.co.uk/brands/cervelo/caledonia. As ever (on lots of makes), base-model wheels are one of the ways they've cut corners, so worth digging into specs and seeing what's worth paying extra for up front. What are you looking for in this bike, what's the budget, what alternatives are you considering?