I ran the half marathon in Warrington at the weekend. I was aiming for 1:50 so tried to start maybe 20 yards behind the pacer. Bit of traffic early and lost him, but I was running 15s faster (per km) than that pace and didn't catch up until 11km (went on to do 1:44 though so not complaining!).
Hi last year I picked up a large and it was MASSIVE. I wanted to downgrade to a medium but couldn't find anyone to swap with. I emailed the GNR and asked if they would swap mine, or if they had any spare mediums I could buy. I didn't hear anything back, until that is December when a medium just turned up in the post from them! So worth dropping them a line.