can anyone tell me what this leak could be, brake fluid or power steering fluid and how to fix. ( up under dash where brake pedal rod goes through) In the UK so parts harder / expensive. Thanks

 

Brake Booster

 

mine was leaking like that,
i added atp at-205 reseal into the power steering fluid and it stopped the leak.
i replaced the hydro boost the power steering pump and lines 2 years later but not because of leaking i just wanted to replace them since i got what i thought was a good price on the OEM parts from rock auto at the time. and the old power steering pump was a bit worn out. figured it was a good time since they all connect to each other.