Pete,
I don't know if you are still interested in this?
According to the exhumation order issued in March 1962, there were 17 German WW2 burials in Bridlington Cemetery. The two unknown German Airmen were jointly buried in W.257. Their date of death was given as 9.12.39. Three others, who are identified are attributed a death date of 15.8.40.
When the burials were relocated to Cannock Chase German Military Cemetery, apart from Schoene (W.186) and Przywarra (W.195), who were reinterred in Plot 3, Row 16, Graves 511 and 512, the remainder were reinterred in Plot 3, Row 12, in consecutive graves.
I can identify all of those in Graves 367 to 381 as from Bridlington. Grave 364 has the sole burial from Skipsea and 382 & 383 are from Selby.
In Grave 365 is Arnulf Neumeyer and in Grave 366 is Rudolph Bihr. Both are attributed a death date of 15.8.40. I believe that these are probably the two previously unidentified men at Bridlington. Part of the VDK remit was to attempt identification, where necessary.
The only reason that the VDK left either WW1 or WW2 burials in place was if they were unable to carry out the exhumation within the restrictions imposed by Section 25 of the Burial Act 1857. In effect this meant that the exhumation would not take place if it was to be from a common grave, where it would entail disturbing other occupants. Rather than request permission from the relatives of the other deceased, as was required by law, the VDK, in collaboration with the CWGC and the Home Office, decided that in these cases, the burial would remain in-situ, unrecorded and unmaintained. For example, Greenwich Cemetery still contains the burials a number of German PoW's from WW1, who died in the local military hospitals.
Phil