Centaurus - The local library service will most likely have copies of local (Tonbridge) newspapers from 1942 and 1943, either in original or microfiche versions, that will quite likely have reported on the attack.
You need to narrow the date down a little more to reduce your search range. Are there possibly any (local to Tonbridge) WW2 historians that you might be able to find, that have a huge collection of wartime info?
We are fortunate here in Australia, that the National Library of Australia has optically scanned nearly all the available newspapers from 1803 to 1954, and put them all online. The system is far from perfect, but it beats anything we had previously.