This was a trivial issue which has rarely been discussed on here. However it was amazingly one of Bamber's 15 grounds of appeal in 2002.
It is claimed the prosecution deliberately withheld a photo of this from the defence at trial. The COA disputes this happened. Anyway in 2002, Bambers team had somehow obtained this photo.
The COA says the photo would not have made a difference to the verdict. They also say it was probably Sheila who scratched this.
I have no idea whether the prosecution withheld this. There was no reason for them to, as I agree with the COA that it would not have influenced the verdict.
I disagree with the COA that it was probably Sheila who made the marks. It could have been Bamber or anyone else who had stayed in the property. This includes the twins, as the scratch marks were found in their room. The marks may have been created years beforehand, so of no relevance.
Do other people agree this ground was wasting the COA judges time ?