Yes. one of the reasons for the popularity of the class 66 to open access freight operators in Europe must be that it will fit anywhere and doesn't have to be made to work with a variety of electrification! At present the Eurostar works on: 750v DC third rail in London 3kv DC overhead in Belgium 25kv AC overhead on other bits, but there are several pantograph settings for the high speed line, Eurotunnel (higher contact wire) and domestic UK overhead (lower contact wire...) Some of the French owned Eurostar sets are also equipped to work on the 1500v DC overhead used in other parts of France You will be able to get standard Euro sized freight to London by 2007 along the high speed line if needed, but it won't fit on any UK domestic routes.
The Class 66 is e relatively cheap engine, and EMD can build it very quickly. It fits everywhere, thanks to the small shape of the engine (English profile.....). And it doesn't need electricity from the catenary, so it is flexible and you can use it anywhere and in most countries.
Thanks for the info on the electrics. I should have assumed there would be a significant range in voltages and frequencies. Europe, as a whole, has so many different cultures, languages, and dialects, and initially the railroads in each country were developed in total isolation from one another.
