Last I heard, LXHEC had been re-registered MXHEC.
I did see a Dauphin or EC155 near Woking heading north west early this pm; maybe it was the same one as it had come from the Lydd direction.
The pilot of EIGJL told me there isn't a lot of difference between the two types, the '155 simply being the latest development of the Dauphin.
It has evolved a lot in the last 38 years. I flew in the prototype at the '74 Farnborough Airshow when it was a tailwheel design; pilot said 'call me Kof'.