HAs Frankier Howard been drug out of retirement to direct Up The Royals? An new sendoff?

Apparently after Up Pompeii, and Up the Front, Frankie Howerd took a long break but now I read that somewhere they want him to do a sendup on the royal family with the Duke of Pork petitioning the Queen to change his name to the Sheihk of Dork and lots of wobbly bits and ins and outs of rooms at the palace and derry airs flying up from under blankets. Is there any truth to this rumur?