Official records seem to have been kept in different forms but many have not survived. The Surrey County Council Special War Executive report would have given a general overview of Surrey together with statistics. Some individual boroughs produced lists and annotated maps for their own use. An example of this is reproduced in David Rose’s book ‘Guildford: the war years’.
Original Air Raid Precautions (ARP) Incident Books list bomb incidents. The ARP Incident Book for Hambledon RDC is held at the Surrey History Centre and Godalming Museum has other ARP books. Surrey History Centre also holds War Damage Assessment Maps for Guildford RDC, Woking UDC, Hambledon RDC and Leatherhead UDC. Individual boroughs hold all other maps and reports in existence. Further sources for bomb damage are police and home guard records. These sources are often not catalogued and their existence may only be revealed by local enquiry, their continued existence often only being by chance. The amount of detail is variable. Grid references were not required so the listing of just a street or property will give no idea of the point of impact. Another problem is that there has often been considerable post-war development, names have changed and open country built over. It can be quite difficult to identify the original bombsite.
The magnitude of a bomb can be useful when looking at the possible extent of damage. One unexploded bomb will have little impact but four High Explosive bombs on a residential area of Guildford damaged 370 houses. Most bombs caused relatively little damage or loss of life considering their power. One of the worst being the bombing of the Vickers factory at Brooklands where 87 were killed and 419 injured. This was more than the total for all of the neighbouring 11 council areas for the whole war.
Bomb damage records often include details of plane crashes, as a crashed plane, whether carrying bombs or not, would cause similar damage to bombs.