Yes I watched it again, and Daniel phoned Mark and Katie in the car to find out what they thought of Felipe's purchase, and those two were the first to express "Absolutely brilliant, well done Felipe."
Daniel was right, he was in the same boat as them.

I also noticed in the latest episode Mark bring up a quibble of a price difference of a couple of quid for a purchase Katie made to the camera. Saying that we will see what difference that makes if we lose and are in the boardroom. A couple of quid.
Sly f*cker was looking for an angle to stitch Katie up should he get the opportunity to use it against her. Not thinking about the team at all.

He's a snob as well. When they arrived at the council flats he said to Katie "this looks like somewhere you would live"

Yes, she was so friendly, I thought it was quite rude and not that funny

But is that really so terrible? Lord Sugar outright asks people in the boardroom who they think should be fired, and he gets angry if the contestants don't have legitimate reasons. Yes, they're in teams, but ultimately only one of them is going to actually win. Loads of contestants look to maximise a fellow competitor's mistakes so that they can use them to scapegoat that person in the boardroom if they need too. It's part of the nature of the competition, and Mark is hardly the first person to use this tactic, and he certainly won't be the last.

Was a horrible thing to say, definitely.

To be fair, that was a joke from Mark, and Katie took it as such.