The quote also confirms the presence of members (plural) of Thames Valley Police Special Branch at the Kelly house.
The quote is from Page 32 of Assistant Chief Constable Page's evidence given on the morning of Wednesday 3rd September 2003:
3 Q. That is the scene. We have also heard about Dr Kelly's
4 offices. What searches were carried out at the house?
5 A. The house was subject to a full search by search trained
6 officers and by members of Thames Valley Special Branch.
7 Their presence I felt necessary again because of
8 Dr Kelly's background. Should we come across any
9 documents of a secret nature, those officers are cleared
10 to handle those documents. That is why they were there.
11 Q. You are not cleared to handle those sort of documents?
12 A. Not at present, I have been in the past.