Thanks for the prompt reply Having inspected the bunker, the penny has dropped, and it is our fault. The channels are not locked together properly. My apologies, in our haste to build it we have not taken the time to fully understand the instructions. The fix we made has done the job and we are still happy with the product. Sorry for the inconvenience, and I'm impressed with your customer care.
Thank you for the very fast delivery of my order which was placed on Tuesday evening...(it's only Thursday!!)...I am so happy with my purchase and will definitely order from you again!! I will pass on your details as I know friends are going to ask where I got my fireside accessories! Thanks again and Kind Regards, Louise