“Going round the wrekin” meaning doing something or going somewhere the long way. When I was younger I thought this was a universal saying until I realised the Wrekin is a huge hill & hill fort next to the A5 (Watling st) in Shropshire that was at one point used as the capital of the Cornovii tribe & its name derives from Celtic for Wrikon. Its a beast to walk to the summit but the reward is spectacular. You can see the Roman city of Virocnium but the Castra at Eaton Constantine (which was used to flush out the celts) is sneakily & purposely hidden from summit view. It must of been some graft for the Romans ascending that hill & routing the Celts.