For those that haven't read it the Richard Cox book makes for an interesting read. What it outlines is that the British strategy of defence in depth, i.e., the GHQ lines, probably would have been succesful in delaying the German advance for sufficient time to allow for reserve forces in the Midlands and North to join the fray. Unlike the allies in 1944, the German plan did not appear to take into account the significance of transport links, such as the railways, which would allow rapid British reinforcement en masse.
Undoubtably, the Southern counties would have taken a pasting and British military and civilian casualties would have been high. However, once the RN had reached the channel, with the support of RAF top cover, and combined with the German's lack of suitable seabourne transport, it does seem likely that any initial landing would be contained, starved of supplies, and eventually defeated.
BEAg's - agree, it would make a great movie - just make sure Spielberg isn't involved or it will be G.I's fighting off the massed German hordes.
