There's no point in doing an intelligent quiz with me sitting opposite Kerry Katona.
Before my stroke, I thought I was infallible, because I was physically strong, and could do these endless hours with no effects, whatsoever. But sooner or later, we all hit a wall.
I used to go salmon fishing with the late Jim Slater, the renowned investor, and he would give me tips. He told me to buy shares in football clubs, so I invested in Manchester United before its shares went through the roof.
I think one of the things about railways, if you get on a train you do find - as you come into Paddington, or wherever - you look into people's windows in a way that you just can't do in a car or any other way.
But then we got to Victoria Falls at the end: at dawn it's one of the most beautiful sights you will every see. We stayed at The Victoria Falls Hotel, a luxury hotel that looks out over the falls.
Whenever I go abroad, I never return home craving roast beef and Yorkshire pudding or fish and chips. Instead all I really want is a particularly good lamb dopiaza.
I think the relentless tide of celebrity stuff on the telly is getting pretty tedious.
A big percentage of the Argentine economy is founded on beef ranching, and they produce steaks the size of dustbin lids. Malbec is the finest red wine in the world, and most restaurants have a wide selection.
Sometimes I'll go fishing with a group of friends but I am just as happy sitting out there on my own. The strange mixture of peace and challenge that comes with being a dedicated angler has always been intoxicating to me.
When I was four years old, I found fishing and it has been my base ever since.
I first visited Buenos Aires at the end of 2015 while filming the latest series of 'Chris Tarrant: Extreme Railways', and I liked it so much I've been back twice with my wife. It's so much nicer than I expected - like a warmer, bigger, wider version of Paris.
My father was the marketing director of a biscuit manufacturer in Berkshire. It meant that every Friday he brought home huge bags of broken biscuits that could not be sold.
My grandad was the most wonderful man. He was a bit like me. He was basically a country bumpkin but he did well; he became managing director of quite a successful company but all he really wanted to do was to come home, put his disgusting old trampy clothes on and go for walks across the country.
Probably the most formative thing was at the age of four my Granddad took me fishing. That actually became a major part of the rest of my life.
There's a point at which we have to control our borders. The bottom line is the world is full up and the population on the planet is getting bigger and bigger and there ain't much room any more. So, how's it going to work? I don't know.
If you go to Japan, even at the pokiest little station, every single train is arrives and leaves on time - not to a couple of minutes, within 30 seconds. In Canada, they have constant problems with massive avalanches and bear attacks on the line, but all these problems are solved immediately.
The Blue Train in South Africa is fantastic. You start your journey in a VIP lounge where you have your own individual steward who shows you to the train and looks after your cases, and it's champagne all the way.
When I was at university in Birmingham, I used to spend half my grant betting on horse racing. Seven terms out of nine, I made a profit.
So as long as I can do something like this kids show or I can go off and film polar bears or I can do some radio and stuff, and sort of keep other strings in my bow working, then it's good.
I don't want to go back to Capital Radio. I don't want to go back to rolling in custard with Sheena Easton and Annie Lennox.
