flying clutchman

Varies, depending who you go to. £250-£350 all in. I've no idea what Ford charge but there's no need to used main agents if you don't want to pay through the nose. The job is straightforward and genuine or patterned parts readily available

The 1.6 petrol doesn't have a dmf so no need to worry about it. The squeal is caused by the clutch disc glazing ( general wear and tear) and used to affect escorts quite badly. It's not a sign of anything worse happening. If it gets on your nerves too much changing the clutch will cure it.

That's what it looked like at first sight. You'll just need a new gasket for the end cover

Well, it's a possibility as the fluid is red. Mk1 Focus gear oil is not normally red, but sometimes people put it in. You could try getting it steam cleaned then look to see where the fresh oil is coming from

I've seen a few focus leak from here. I've never changed one of these seals but I think you could remove the knuckle on the end and then prise out the old seal. You can easily check, just unclip the front cover  and look at the bottom selector.