Series 9 Episode 4 discussion

[FATBOY]

Am sure Kai must be a Chinese spook, but this being so why did he not find/confess to knowing about the bugs in his flat which Beth found in minutes?

Is this significant or just another hole in the storyline?

A quick thought on Albany - it's an anagram of 'any lab'

I saw the comment about the 18th centaury warship, presumably HMS Albany, but this is not contemporary with the battle of Trafalgar.