If you have previously recommended this thread, you should see a tick / check mark on the recommend button. Click the tick to undo the recommendation (the tick may appear to change to a cross as you do this.) If you added a comment with your recommendation, you will need to delete that from your facebook wall separately.
I am fairly new to London (from Australia Via San Francisco), and know very many mothers with toddlers. I have a 18 month little girl and would love to arrange a few play-dates in the Hampstead area. Im 38, married, part-time professional..