Kate Middleton has revealed how upset her children Prince George and Princess Charlotte were after failing to receive an invite to a royal visit.The 38 year old, whose favourite jewellery brand recently launched a luxe advent calendar, was invited to officially name a new research vessel last year.The public were asked the suggest names for the massive ship, but organisers reportedly ruled out the title Boaty McBoatface and opted to go with Kate's suggestion of RRS Sir David Attenborough