Southern England's enclosed countryside is compared with the bocage encountered in Normandy. In the invasion scenario, local defenders would know that terrain better than the attackers. One incendiary proposal attributed to the Home Guard involved burning oil or petrol on coastal waters. Personnel intended to remain behind enemy lines would add disruption as the invasion advanced. The later clarification gives the Home Guard a delaying role: hold ground until the regulars arrived. This assessment describes preparations and a hypothetical invasion, not a campaign fought on British soil.
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Local resistance and the Home Guard's delaying role
The proposed defence combines difficult country, local knowledge and time gained for the regular army.