www.jec.org.uk

Just been trying to dig out the prices for cars at introduction in 1961 but can't seem to find it.

Can anyone help please?

That noted source of misinformation, Wikipedia says:

An open 3.8 litre car, actually the first such production car to be completed, was tested by the British magazine The Motor in 1961 and had a top speed of 149.1 mph (240.0 km/h) and could accelerate from 0-60 mph (97 km/h) in 7.1 seconds. A fuel consumption of 21.3 miles per imperial gallon (13.3 L/100 km; 17.7 mpg-US) was recorded. The test car cost £2097 including taxes