AP Photo

Student demonstrations? Let's have more of them. A long time ago, I chased Margaret Thatcher across a university campus during a high-spirited protest, and I didn't have anything like as much to complain about as the students who marched through London last week. I wasn't facing a trebling of tuition fees, decades of debt and the creation of a two-tier higher education system; looking back, it was a halcyon moment when a girl from a low-income family could go to university, get a degree and leave unencumbered by debt.