Unless you have power steering, in which case the cooler pipe is mounted onto it. Then it becomes a prescribed area for the steering.
The odd hole is ok but if the engine support crossmember mount is broken the tester can fail it because the engine and gearbox falling down would affect the steering or brakes.
If the area round the bonnet catch support is broken away and the bonnet doesn't close fully the tester can fail it too as the bonnet flying up would affect the drivers view of the road.
If the crossmember is so bad the bumper is loose it can fail too.
A badly corroded crossmember can affect the headlamp alignment or security, fail too.
Finally, if there are corroded bits hanging down the tester can fail it for having projections likely to injure other road users.
So, the micra can pass but only if the holes are small!
Another thing to consider is if the Police pull you over and they notice they can slap a prohibition notice on your car. The police check your car under the construction and use laws rather than the MOT basic safety check. So things like a holed crossmember, bad boy exhaust or loose battery may pass an MOT but the Police can put you off the road for them!
Besides, do you really want to drive about with a manky, holed old crossmember? Risking other damage, loosing your radiator and significantly weakening your car?