Pretty much the same as in London, as expected. Ash is common in the UK but not that prevalent in London.
Of those listed on the previous page, the most common trees in London would probably be oak, plane, horse chestnut, sycamore, sweet chestnut, poplar. In suburban gardens, cabbage trees, black locust, rhododendron and sumac are fairly common.
In SE England most of the countryside looks like either of these images.
