You can't check EVERYTHING when buying a house.
TBH when we 1st visited in late August the owners were dining on the patio blazed in sunshine. This was about 4pm so maybe the sun does sit high enough in the sky to clear the trees.
Ollyk, Thanks for the link
which explains the law or lack of.
Your right to lightMost people like to make the most of a bright day, whether it's lounging around in the sun or getting on with the garden, but this can be spoilt if neighbours have allowed their trees or a fence to block out your light.If the light in your garden has been blocked by a neighbour's trees, you are unable to force them to do anything as there are no laws covering this.However if those trees are blocking light from a window in your house or even for a green house you can acquire the right to light with the help of your local council.If you have enjoyed a certain level of light for 20 uninterrupted years the laws states that it is reasonable for your to expect the same level of light and you can take action.It is also worth checking your deeds to see if they contain a covenant stating that your neighbour must not block your light.Such covenants may also prevent you from build a fence or planting trees along certain boundary.