Sir Alan and Lady Cobham land on the river Mersey in their sea boat aeroplane.
Item title reads - Great seaport sees giant sea boat. COBHAM, SIR ALAN and Lady Cobham in their African Survey sea boat land on the Mersey. Liverpool, Merseyside.
L/S of the sea boat aeroplane flying high above the river. M/S of it taxiing along the river. M/S as it stands on the water, a man rows the passengers towards the shore in a boat. C/U of Sir Alan and Lady Cobham sat on the boat with another couple.