Just been to the large Sainsbury in Greenwich/Charlton on Bugsby Way and they had a professional dentist in there today offering free dental treatment for babies (with teeth) and kids. The check up was very thorough and the dentist gave us a free kiddies dental kit afterwards containing:
Aquafresh little teeth toothbrush (age 4-6)
Aquafresh little teeth toothpaste (age 4-6)
Hour glass timer
They said they would be there till 7.30pm today but probably better to get there early in case the free kits run out.
Not sure if this is only happening in this branch or all large Sainsbury branches