Every lunchtime RK bought a big slab of fish from the mobile shop at the railway station, not far from the office. He kept his purchase in the fridge in the office in the afternoon, then took it home in the evening for his supper.

I fancied a salmon sandwich for my lunch, so joined RK in the queue for the shop. When it came to paying, I couldn’t find my purse. However, RK kindly lent me £2.13 for my purchase, which included the VAT, calculated separately.