Technically, as any Doctor Who fan will affirm, the Time Lord is a two-hearted alien who “regenerates” in all forms.However, the unveiling of Jodie Whittaker as the first female Doctor has been hailed such a breakthrough that even the Prime Minister has weighed in, while Jacqui Oatley, the first female commentator on Match Of The Day, warned the actress that she will need thick skin.Reactions, largely positive, flooded in from all quarters on Monday following the BBC announcement, with Theresa May stating she was “pleased” with the new incarnation. Jacqui Oatley was the first female commentator for Match of the Day Credit:Julian Finney /Getty Last year, May told the Radio Times that she always tried to watch Doctor Who at Christmas “if possible”.Those fans who admitted they were less than impressed with the news, describing it as “cramming political correctness down our throats” were criticised by, among others, Colin Baker, 74, a former Doctor Who.The actor, who held the role between 1984 and 1986, said he found it “very sad” that some fans opposed the casting of Whittaker and had vowed not to watch the show again. Jodie Whittaker replaces Peter CapaldiCredit:PA Oatley, who found herself at the centre of controversy when she became the first woman to take the microphone for BBC1 flagship sports show, advised Whitaker to remember the millions who are rooting for her. “It’s just a case of remembering why you’re doing the job, you’re doing it because you love it,” she said. “You kind of need to get over the hurdle of the first one. In my case there was so much scrutiny in the build up of it.”Even now people are really positive about it but of course they’re not the ones who shout the loudest.” Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings.