Asked to “step up” to do Easter/Half-Term sessions.

I’m an ECT2 working in a secondary academy. A few weeks ago, my Head of Department asked me to run paid revision sessions over Easter and the May half-term. I declined because I have personal plans (climbing/hiking) that depend on the weather, so I couldn’t commit to specific dates.

In a meeting today, my HoD asked again, and I reiterated that I wasn’t available. She accepted this but said I would be expected to “step up” and run revision sessions in future holidays.

I’m not keen on this — I really value the holidays for my work-life balance and don’t want to give them up. Does anyone have advice on how to handle this or weather I do need to “step up”?