"Ivan" (Patrick's "answer phone double") is possibly referring to the character of the same name in "Dressed" (two episodes later).
In the scene where Steve is talking to Jeremy, Jack Davenport mistakenly flubs a line and says "breast" when he intended to say "rest". In fact, according to the DVD commentary he made the same mistake on three or four takes before they decided to just leave it in.
Jeff: The fact is some women don't have large breasts, and they're people too.
Jane (a.k.a. Jake the Snake): I am the Snake of Truth and I will not be denied!
Jane: I had a moment of madness... I've taken an overdose.
Susan: Oh my god!
Sally: You're not serious?!
Jane: I'm so sorry, I just couldn't take it anymore.
Susan: Oh Christ, call an ambulance!
Susan: Jane, listen to me. You've got to try and stay conscious and you have got to tell me everything you've taken.
Susan: How many? How many did you take, Jane?!
Jane (on the traffic report): Now drivers, before we go any further, let us start with a big mediation and an induced road congestion. So come on everybody, close your eyes!
(cars are colliding down on the streets)
Jeff: Steve, it's a bad idea to actually count women's breasts. The whole bus stares at you.
Susan: (to Jane) I'm not in the habit of charming snakes, I just try to be nice to you.
Jane: To think, when I was committing suicide I'd very nearly given up hope!
Jane: Steve, I am in no way self-centered!
Jane (a.k.a. Jake the Snake): Oh, give me a break you deluded bitch!
Patrick: (on phone) I want to put this as gently as possible... I've been thinking a lot about the future, and... you're not in it. Sorry, it's not me, it's you... no, hang on, it's the other way around, isn't it?
Jeff: Especially the tongues part. I love getting all that extra tongue. You know sometimes I eat really cold ice cream so my tongue goes numb and it feels like someone elses... but we all get lonely sometimes.
At the end of the episode when the Jane's traffic report is introduced it's Ben Miles (Patrick) doing the voice.
This episode was actually the last episode of season two to film.