N reg Terrano on guntree - I went to see it

[blackbird]

There's an N reg red Terrano , square lights on gumtree
I went to see it Saturday
Apart form 3 or 4 dings and 2 cracked lights it was in excellent condition
only surface rust underneath
on 50k miles and father daughter owned from new


1st thing I checked was oil and all was fine
checked water and expansion tank was empty
checked in rad and it was very dry

the owner put some water in and we went for a spin

Drove nice , no overheating
But when we got back I checked the tank and it was like skimmed milk , and shiny on top

Looks like there's a crack in it or the head gasket is gone

shame
was in good condition