Well, they "tailored" Peter Davison's pants when Colin Baker took over... By cutting it down the back and widening the waist. I guess there's precedent. 
But did Peter Capaldi wear a belt with his ensemble? Sure, Jodie Whittaker's five inches shorter, but would it not do for one episode to tighten up a few notches and roll up the pant legs?
Mark

But did Peter Capaldi wear a belt with his ensemble? Sure, Jodie Whittaker's five inches shorter, but would it not do for one episode to tighten up a few notches and roll up the pant legs?
Mark