as above what oil does this box require?

Tps would tell you if you give them a ring.

As for the actual spec of oil, it's all speculation and trial and error since the dealers don't give a rating of oil only a part number.

Same spec oil as normal gearbox for fabia vRS.  Code does not mean it needs anything special neither does having a diff in it.

as above what oil does this box require?

Just changed my gear-box oil,on the old Fabia VRS.

Look at thread 'Gearbox Oil for Skoda Fabia MK1 - 1.9 SDI (2002)'

Can't say what code gear-box I have, apart from it being a 6 speed, on a 2005 Fabia VRS ATZ engine.

 

From OPIE Oils Company recommended: 75W 80 Fully Synthetic API GL-5 

3 litres for £27.00 including vat, as opposed to Skoda Dealers @ £30.00+ per litre..

Gear-box holds about 2.3 litres or near enough, on the level.

 There are various types of head to filler/level plug, but attached what mine is..

75/90 fully synthetic ?

75/80, apparently.

As above 75/80.

I had 75/90 in mine when bought car, gearchange was notchy and not nice when cold.