He was on his way to a meeting in Pembrokeshire when he noticed the woman dangerously close to traffic.
Coleman is said to have driven around Haverfordwest for half an hour to see if the woman could recognise her home, before calling friends in the town to ask for help.
More top news
The Charity Commission is investigating Capricorn Animal Rescue and Sanctuary over its governance and management.
A cloudy day with outbreaks of rain, turning heavy and persistent at times, especially over the hills and in the west.
George North returns from injury to face Scotland, with Luke Charteris also back on the bench.