Front left brake issue

[jt racing]

Hi everyone.
Driving back from dublin last night, 5Hrs round trip, about 20 miles from home, the car started to change up and down randomly, put it into manual and it holds it gears no bother, about 5 miles later i get the abs light come on with the 3 bongs and a flashing brake warning.
Trundling home i can now hear a whoosh noise from the front left but no pull on the steering, brakes feel firm as normal. ( I had there bearing replaced 2 weeks ago on that side).
Drop my friend off, and head to my house about 2 miles away and again after about half a mile noise starts again and abs lights appears again.

Went out for a quick look before having to go to work tomorrow and it looks like something has leaked aroung the caliper? fluid all inside the wheel and up the back of the arch bit on the drive shaft but didin't get any higher than midway up the suspension.
So had to take the astra to work... Jeasus!

I'm off tomorrow so will pull the wheel off and suspect maybe a split hose? But any other ideas to look at would be a help too!
Thanks in advance.