I was looking at this but never did find the answer, ended up getting a 225 one off ebay but the connector was different it was 2 pin instead of 1. Managed to swap the regulator over with the connector on luckily. They certainly look the same.
I may well buy it then drive up to Scarborough and pick up my engine hmmm. Havent driven cadwell since I took out the tyre wall there 2 years ago!