Hi sorry I'm a newbie and have no idea
Could anyone tell me if these brown spots on my leaves are anything to worry about ?
There only on a fraction of the lower leaves.
Any advice would be great
Most maples are looking like yours at this time of the year. Sunburn, hot winds and dry conditions can cause the leaves to look a bit sad.
Keep the water up to the tree and you can pinch off any unsightly leaves.