“I can understand that rollercoaster people go on when they’ve lied.

“They start to cover up that lie and it just becomes a huge web of deceit they can’t get out of.

“I’ve seen people do that and seen it spiral out of control.”

Sarah Parish talking to me about new four-part ITV thriller Bancroft.

It begins at 9pm on Monday (Dec 11) and will be screened over four consecutive nights.

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“I gather there was a lot of excitement online.

“We trended on Twitter as #ladynerds – which I love.

“Bletchley and these girls represent everything that is brilliant about Britain.

“They’re eccentric, non-conformist and think outside the box.”

Rachael Stirling talking to me about series one of The Bletchley Circle and reprising her role as Millie in the second series.

Which begins on ITV at 9pm on Monday (January 6).

I was delighted to be asked to write the cast interviews for the new series, as I had done for the first one.