Thursday: This is my last chance for a big swim before I take part in the LeaderBoard triathlon at Blenheim Palace on Sunday, an event in which more than 30 chief executives and business leaders have come together to raise money for Sport Relief. I manage half a mile, making a total of a mile and a half this week. When I started lessons six weeks ago I was hard pressed to swim two lengths without stopping, so this feels like a tiny triumph. I'm not, however, counting my chickens until Sunday.
Friday: Our directors meet every Friday morning and the focus for this week is our six-year plan, the strategy that will shape the way we operate up to 2018. To survive the next few years in good shape, we really need to be on our game. I'm also pleased to confirm the appointment of a new artist liaison manager with a special expertise in sport. Artists are the lifeblood of Comic Relief, so this is great news.
Sunday: After years of persuading celebrities to undertake gruelling physical challenges, I'm finally experiencing my own daunting experience. Why did I sign up for this, I ask myself? The good news is that the weather is kind, the crowds encouraging and I achieve my three objectives: I finish, I'm still alive and I manage to raise more than £30,000 for the cause. As I cross the line, I feel a sense of relief and achievement. In truth, I enjoy the swim and the cycle, but the run is brutal and miserable. Now I'm off for a long sleep.
Monday: This morning is characterised by aching bones, sore feet, happiness at money raised and disappointment at my final time in the triathlon - but I am consoled by the fact that I am the oldest in the LeaderBoard Challenge group. I have a 7.30am meeting at the office of the former Prime Minister Gordon Brown, who is on the high-level panel of the Global Campaign for Education. Comic Relief is a long-standing member of the campaign and there's a feeling that, with the health lobby having done so well, it's time for education to step up to the plate.
Comic Relief raises funds to tackle the causes of poverty and social injustice.
Kevin Cahill is chief executive of Comic Relief