Hi - thanks for the pointer! I've added this: changeset/122584549#map=21/51.56070/-0.01445&layers=C

Please do let me know if I've got it wrong.

Many thanks

Hi Bernard,
Thanks a lot for spotting my mistake! I'm new to this so really appreciate your guidance. I've made a new change: changeset/122470742#map=19/51.56141/-0.01245&layers=T - Please let me know if I've still got it wrong!