In his weekly Jamie’s Little Allotment column, Jamie Marsh discusses his big day in London… If you are anything like me, you were glued to the coverage of the RHS Chelsea Flower Show last week. Seeing the show on the TV is the preference of many people, and to be honest I can see why, although this year I attended, taking the train. Once arriving at Kings Cross it’s just an underground ride to Sloane Square. Emerging back into the daylight after the short underground ride, I was expecting to be daunted by the hordes of non-London-dwelling people milling about wondering which way to go, but I w…