Car squeals like a pig when you start (1.9SD - 1Y?)
The revs show low until the squeal goes away (guessing due to rev sensor being on the alternator?).
Here is a photo of the pump and its belt. Looks wet around it and I noticed the water level being a bit low...

Ive got a new belt as it looks buggered, whats the likely verdict on the pump? New pump needed? Or just some gasket sealer?
Cheers