LONDON (Reuters) – Britain’s Queen Elizabeth is being honoured with a Barbie doll in her likeness to mark her Platinum Jubilee this year. Toy maker Mattel said on Thursday it was commemorating the monarch’s 70 years on the throne with a Tribute Collection Barbie doll. Dressed in an ivory gown with a blue sash adorned with miniature medallions and ribbons, the figure also has a tiara based on the one Elizabeth wore on her wedding day. Elizabeth, who turns 96 on Thursday, ascended the throne on the death of her father King George VI on Feb. 6, 1952. She is the longest-ruling monarch in British h…