Fabia II vRS multiple misfires - fuel?

Hello all I wonder if someone can help me pin point this. I have attached below some faults which fatty5000 kindly helped me read last night. The car is a 2011 Fabia vRS and has covered less than 6000 miles. I have had it just under 2 weeks and about a week ago under some harsh acceleration, the EML flashed for about 10 seconds and I have never seen it since.

Upon reading the faults last night the below came up, highlighting some misfires. I'm aware that 1.4 TSIs should be run on higher RON fuel so since buying it I have run it for 1000 miles on Tesco Momentum 99, but I'm aware it takes a couple of tankfuls for the ECU to "adjust" to the higher RON fuel. My theory is that prior to me owning it (car is ex-demo) the dealership may have ran it on normal 95 RON, to the misfires may have just been the result of adjustment.

What are other peoples theories on this?

Many thanks

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VCDS Version: Release 10.6.5

Data version: 20110930

Thursday,20,October,2011,20:16:35:28932

Chassis Type: 5J - Skoda Fabia II

Scan: 01 02 03 08 09 15 16 17 19 25 37 44 46 55 56 76 77

VIN:

-------------------------------------------------------------------------------

Address 01: Engine (------CAVE) Labels: Redir Fail!

Part No SW: 03C 906 027 CE HW: 03C 906 027 CE

Component: 1.4l R4/4V TS H14 7927

Revision: L2H14--- Serial number:

Coding: 00250012000400000000

Shop #: WSC 13765 031 00000

ASAM Dataset: EV_ECM14TSI01103C906027CE 001009

VCID: 66C8208428FC

5 Faults Found:

4363 - Brake Boost Vacuum System: Mechanical Failure

P1479 00 [096] - Open Circuit

Freeze Frame:

Fault Status: 01100000

Fault Priority: 0

Fault Frequency: 15

Reset counter: 96

Mileage: 4060 km

Date: 2003.15.12

Time: 22:00:00

4054 - Cylinder 1: Misfire Detected

P0301 00 [096] - Short to Plus

Freeze Frame:

Fault Status: 00000001

Fault Priority: 2

Fault Frequency: 1

Mileage: 7887 km

Date: 2010.14.12

Time: 09:24:16

4060 - Cylinder 3: Misfire Detected

P0303 00 [096] - Electrical Fault in Circuit

Freeze Frame:

Fault Status: 00000001

Fault Priority: 2

Fault Frequency: 1

Mileage: 7887 km

Date: 2010.14.12

Time: 09:24:16

4057 - Cylinder 2: Misfire Detected

P0302 00 [096] - Open or Short to Ground

Freeze Frame:

Fault Status: 00000001

Fault Priority: 2

Fault Frequency: 1

Mileage: 7887 km

Date: 2010.14.12

Time: 09:24:16

4051 - Random/Multiple Cylinder Misfire Detected

P0300 00 [096] - Mechanical Failure

Freeze Frame:

Fault Status: 00000001

Fault Priority: 2

Fault Frequency: 1

Mileage: 7887 km

Date: 2010.14.12

Time: 09:24:16

Readiness: 0000 0000