I have to send others to the USA, so it makes no difference to me. As to why repairs are in the UK, either it is because the majority of Decca owners are there, or maybe Neil could have been trained by John Wright, and could easily take over his equipment, whereas an American tech might not be able to do either so easily.
It will be curious to see what they are to cost now, and whether there will be an "improved" version as suggested when londondecca.com first came online.