Various MOT related Questions

Hello all,

My car's MOT is due and i've checked it over as a DIY grade mechanic and had a few questions.

Car is a 2006, Mk1 Skoda Fabia 1.9 TDi

Handbrake cable outer rubber coating has a small tear in it, where it clips into the hanger on the underbody. Handbrake works & releases properly. Is this a fault?

Car has retrofitted HIDs. The original Halogen headlights have been split and a HID specific lens was put inside the headlight and then they were re-assembled. Beam pattern looks perfect on a wall with the kick up to the left.
Will it fail on this or lack of headlight washers? These cars had the option of factory HID headlights but this didn't have them. The retrofitted ones look almost identical though.

The under body protection around the fuel cooler is a bit darker than the rest of the under body paint, implying there may be a fuel leak. But i'm not sure if this is stained from before i bought the car as there's zero smell of diesel there and zero drips. No rainbows etc on the road when parked in the rain. 
Could this be a fail, or does it need to be a visible leak?

The engine had an oil leak from the tandem pump. The gasket was replaced and the leak was fixed and mosst of the engine was cleaned but some hard to reach areas with lots of sensors couldn't be cleaned and it thus has some wet oil still on the side of the block. Would this be a fail?

There's a broken load balance cable from the alternator to where ever it goes. I've fixed 2 breaks already but i can't find any more.
This results in the Electronic stability control and traction control disabling themselfs 10 minutes after the engine is started. Would this constitute a fail if noticed?

Could someone also advise if possible please the correct way for testers to determine if corrosion is excessive. Am i right in thinking they apply thumb pressure, then if it's crunchy, they can tap it with their inspection tool?

Is it still mandatory as well for them to provide a viewing area and allow you to watch the test, if requested?

Many thanks.