Aahhh, ok, it makes sense now. I took from your earlier posts you both applied for a new joint account and your DH was accepted and you were declined! I had never heard of this and was very confused! Sorry, my mistake.
Ok, so you applied to have yourself added to his already established account. So based on everything you've said it appears you've been declined for having a low application score. This is not surprising as you've mentioned you have no credit in your own name. Transferring bills into your own name won't help, by that I mean utility/water bills etc.
You mentioned that you have a bank account, is this a current account with an overdraft facility (if not, does it have this functionality?), direct debits on it?
Looking at Experian will only show you what you already know (although no harm in looking), that you have no credit at the moment. It will more than likely say you have a hgh credit score as it tends to do this when there are no defaults, public information found which confuses people as they think that because Experian says they have a score of 999 that means they have a high credit score but then they're declined on score when they apply for credit. What that actually means is they've failed that particular lenders application score which is made up of numerous factors, only 1 of which is data found at the credit reference agencies i.e Experian.
If you definitely want a joint account with FD you should try and build your credit by applying for a credit builder credit card which will have a high APR so use it sparingly, regularly and pay it off every month or you will be charged a fortune. Then reapply in 6-12 months with FD. Alternatively, apply for another bank account together which may help boost your credit score as you will be applying at the same time for the one account as opposed to adding onto an already open account.
If that still doesn't work money saving expert is good for showing you what accounts you could be eligible for based on low credit scores. Well, I know they do this for credit cards but not entirely sure if that is the same for current accounts.