RHS Botanist Neil Lancaster confirms that this particular plant is...
Kalopanax septemlobus f. maximowiczii and is distinguished by its more deeply lobed leaves.
According to Bean a large decidous tree 90 feet high in the wild and "one of the most remarkable of cool temperate trees". Native of Japan China Korea and Russia.
There are specimens up to 60 feet high in the UK.
Ian Watt is a UK Based photographer and horticulturist specialising in garden photography, nature photography and landscapes.