If you find an area of your garden that pools in wet weather this pump mounted in a drum may be the answer. The pump will need to be connected to a 240 volt supply but will automatically switch on and off during heavy rain fall.
Dig a square hole
Fit the barrel inside the hole
Surround the barrel with 20 mm stone
Run the cable to a 240 volt supply
Check us out on Youtube "pcdsol" to see this product working