Posted: 27/03/2016 at 20:13
Can't help you with the turf Tom, but you'll get seed suitable for shade at any garden centre.
If the garden's very shady though, grass will tend to struggle. The trees add a bit more of a problem as they take a lot of moisture and nutrients from the soil - all things that grass needs to look at it's best. If you really want to have grass there, you may find it takes quite a bit of effort to keep it looking good.