The Vehicle to the left is a British Sherman Based BARV (Beach Armoured Recovery Vehicle), or known as the Sea Lion.
What is interesting is it is the very very early M4 with the three piece transmission cover, which before the conversion would have had the M34 Turret. It is roughly a pre-41 Model and even by the Shermans first combat debut for the British at El Alamein they had already chaged to the M4A1