Thanks for all the replies.
I'll check the rear pressures and see, as that appears to be a quick fix if worked.
The dealer I got the car from isn't local to me, so will have to go to a local one and see if they'll take a look; I take it if the alignment is deemed incorrectly done when delivered it would be sorted under warranty by any MG dealer?
Saying that do the dealer workshops have the equipment to do the alignment or do they send it elsewhere?
When you driving down a straight road, is the steering wheel, slightly off centre to the central position?.
Therefore when you try and correct it with your hands, does this feel like the car is drifting towards the centre of the road or towards the kerb ?.
This will give you a strange feeling that you are fighting against the car wanting to take you in a different direction, than that indicated by the steering wheel.
If this is the case, then when the car had the wheel alignment check done at the factory, the steering wheel was NOT set in the dead straight ahead position first.
So when you are driving along a straight road, you are constantly trying to correct the error displayed by the off centre steering wheel with your hands.
Does that make sense ?.
Your mind can not deal with driving a car that is set up this way, and constantly you are trying to correct the error, which sends you off course.
The wheels maybe aligned correctly with regards to the steering geometry and running parallel when it is driving down the road, but it has been set incorrect to the steering wheel alignment.
If so, it will just need the steering wheel set in the correct straight ahead position FIRST - then the wheel alignment reset to the correct level of toe in / toe out recommended by the manufacture.
Very unlikely, but the steering column has been attached to the steering rack one spline out of the correct position when it was assembled at the factory.
I doubt this as most have a master spline now.
Just to be clear here, the tracking of a car does not just “Go Out” as some garages will have you believe, when they want you to pay to have it corrected.
The so called “Tracking” or correctly put, the wheel alignment will only report out in mainly under the following conditions.
1) It was incorrectly set the last time it was “So Called” adjusted.
Usually caused by operators error.
2) There is wear in one or multiple components of the cars suspension system ( older cars ).
Worn track rods ends, ball joint wear or suspension bushes or components.
3) The car has suffer and impact with something really hard, like a huge pot hole or had a very hard side impact with high kerb etc.
But we are talking about a HARD impact here, not a just wheel scrap along the kerb.
Rather like something that is capable of bending one of the steering / suspension components.
When the steering alignment is set correctly it will remain correct, until one of the above situation should arise.
If you are witnessing uneven tyre wear on a pretty new vehicle, then the likelihood is the wheel alignment was never set 100% correct at the factory.
Wheel alignment is an easy function to perform, BUT only when it is done correctly.
I have correctly reset the wheel alignment on SO many cars that I have lost count.
Some of the things I have seen over the years would shock most people.
If you are told :- “Hey mate you need your tracking resetting, do you want us to do it, we are doing it on a deal with your new tyres”.
I advise caution

.
Take it to somebody who only specialises in four wheel wheel alignment and has been doing it for many years.
Buy cheap, buy twice !.
Otherwise you could be replacing your new tyres before to long.