Sumps & pumps - Garden drainage problem

[kneedeep]

My garden floods very badly several times a year and there is nowhere to drain the water too apart from a surface water drain which is about 2ft above the level of the garden.
The only option that I think I have is to use land drain pipe, create a concrete sump and then use some kind of pump to get the water to the nearest surface water drain.
I would like the pump start automatically so I was thinking that I could use a submersible one similar to the ones found in Machinemart ? Would the pump be ok left in the sump all year round ?
Has anybody done anything similar or can think of a better solution ?

[GB_Groundworks]

Yes ok but protect from heavy frost

There's a section on the main page about them

[kneedeep]

To reduce the pumping distance I would like to extend the existing drain to nearer the sump.
Is there any legislation regarding extending drains or pumping water into a surface water drain that I need to consider ?