Right now, Zoe and Jen are driving northwards, from London to Edinburgh. They set off from Surbition at around 10am this morning. At 17:30 they were stuck on the M6 somewhere near to Stoke-on-Trent. I believe the screenshot of a map taken from the AA Roadwatch website may explain their slow progress:

Oh dear! I promise to save them some Shepherd’s Pie.