Yes. It's presumably to try and keep the viewers after the end of the Cheltenham Festival coverage from Tomorrow until Friday. Flinging out 4 celeb specials may keep more viewers stuck to ITV than running the usual civilian editions.
That can probably explain why there are celeb specials of The Chase that were recorded a while back ago being repeated even though they are out of the times of the Cheltenham Festival (which runs from 3-4pm in which the 2 shows Tenable & parts of Tipping Point would be aired) Other than that, thank you for the clarification & information you have just given. I give it a big appreciation.
I was wondering for a while why they showed repeats, now I knew it's because of a major event going.