How do banks send bank to bank cash?

It varies from country to country. Every country has a central bank that is the bank for other banks in the country. Ex: Federal reserve system - USA Reserve Bank - India etc

because if they dont bank they dont get money, and there will be no banks

You need to visit any bank branch near you and submit a form for demand draft issuance. Once you enter the details of the person to whom the draft should be paid, the amount etc., you need to sign it...

I have tried this in Warrington and they point blank refused. However, according to Clydesdale they should take the deposit. I tried twice at the same branch in Warrington, but to no avail. I will...

its basically a commercial banks but is now engaged in operations in bangladeh and is forming joint operations with Maybank so it is also a foreign bank in terms of ventures but not operations