What is it? We happened to stumble by accident across Gillespie Park, a little-known North London nature reserve, a few years ago, and have loved it ever since. Where is it? Squeezed neatly into a little plot of land in N5 above Arsenal tube and below a busy train line, amidst Highbury's densely-packed Victorian rows. Islington is the London borough with the least amount of parkland, so Gillespie offers a bucolic break for locals.......