"brianlb" wrote in message
...
The grass in my smallish back garden is covered in wormcasts. Can anyone
suggest how to get rid of them (especially when incessant rain keeps them
wet) and in particular how to stop new ones appearing all the time?

Sweep them with a lawn rake. You cannot stop them unless you kill the worms
which would not be a sensible thing to do.
If the lawn is always waterlogged in your small garden might it not be a
better idea to do away with the lawn?