Spot on Kev.

Yes Duratec HE is built at Valencia.
Bridgend build 1.6 Sigma (ZS) not sure where 1.25 or 1.4 is built. Bridgend also build Jaguar/Land Rover's V8s
Diesels come from Dagenham (a couple from Peugeot) and I'm sure Dagenham still build a small volume petrol engine but I don't know what it is. It may even be the old Cologne V6.
I know that Cologne build engines but can't for the life of me remember which ones.
The FRS engine was indeed a re-badged Zetec-E (cast Iron Block) as was the 170PS VVT version used in the ST170.