Hello Tony,
I agree that a front panel should not crack, provided it has been used within the designed specifications and for normal caravanning. There is sufficient history to this subject to improve your chances of some remedy. However I must advise you it may be somewhat more complicated than JTQ indicates.
I must re-stress JTQ's first line that the Sale of Goods Acts only applies to the original purchaser and the new retail seller.
Whilst SoGA does not specifically state there is a six year time limit on claims, that has been the longest that general claims have been successful, and is seen as a practical maximum limit. BUT, the claim period is considered with respect to the reasonable life expectancy of a product, so for many items six years is too long.(i.e. fresh produce, car tyres and brakes etc) I personally think the a caravan front panel should easily last six years - but that is my personal view.
For products over six months old, the onus is on the plantif to establish the fault probably existed at the time of purchase, and that nothing has befallen the product that may have caused or worsend the damage.
Whilst any case would be heard in the small claims court, and it is perfectly lawful to represent yourself, in cases like this it is better to seek professional advice before embarking on a claim.
I hope Bailey are sympathetic to avoid any need to go legalistic about it.