Not taxpayers money – the initial memorial will be paid for out of the LIBOR Scandal fines, although I believe that taxpayers money will be needed for the upkeep.
Like the Bomber Command memorial in London I think this is a case of – too little – too late – as anyone actually serving on D-Day would have been a minimum of 18 (officially, although we know of people being younger) or older, so if still alive the youngest will be 93 in 2019, to be able to visit and remember their fallen comrades, more likely it will be the families of the fallen who will visit.
Allan