The move gives the French group control of a raft of businesses from radar and sonar, to internet services, as well as Racal's 22% stake in the UK's NationalLottery operator Camelot.
News of Sotherton's reluctant decision to bow out of the gruelling multi-discipline challenge emerged on Monday when UK Athletics announced its list of National Lottery-funded athletes for next season.
"However, there would be significant implications for Wales and the other devolved nations if the English Heritage were to be merged with the UK-wide Heritage Lottery Fund and National Heritage Memorial Fund, " said the spokesperson.