Had a text and Email from them this morning. Thankfully I'd already checked them out on here! I did reply to them as follows...
You have just offered me a job that will involve handling potentially valuable goods. I have had no face to face interview and there has been no mention of a CRB check. I thought I'd better be cautious so I've done a few checks and it looks to me like you are a scam. I do however believe that I should give you the benefit of the doubt and have decided that if you are indeed interested in employing me, and can send me the uniform etc on approval, I will be happy to pay the £56.00 out of my first weeks earnings. I have recently had a CRB check done so you'll have no problems with my honesty.
If however you are just scamming people out of money (that in my case for certain I don't currently have) think about how those people are currently struggling to pay bills, and feed themselves and their children for the sake of your greed.
I sincerely hope you are not a scam and will happily apologise for the above comment if this proves to be so.
I look forward to your reply