I need to connect my brake fluid reservoir to some copper pipe leading to my master cylinders with flexible hose. I need a piece about 50mm long. I have plenty of hose marked Fuel. Is this OK with brake fluid?

Get the proper stuff. Brake fluid can disintegrate unsuitable rubber in no time. Dont wish to preach, but is it worth saving a few pennies to possibly compromise your brake system?

Fuel hose will not pass S.V.A. You will need the correct type , got mine from Think Automotive . Not cheap but cheaper than brake failure or a retest fee. The kit sold by Europa is not correctly marked and therefore will not pass S.V.A. unless they have now rectified this.

think auto's blue/purple cotton braided is the stuff for sva..

Ned.