[bitfolk] DNS Query

Could someone please help me with setting up nameservers on a new Bitfolk VPS (Debian Jessie with ISPConfig 3). My old server has hostname vs1.vconsult.co.uk and the new one is vs2.vconsult.co.uk I currently use an external provider for Primary and Secondary DNS but would now like to run my own nameservers. vconsult.co.uk is hosted on UK2 who do not appear to support glue records, needed for nameservers. I have other domains that I could use on Fasthosts, who do appear to support glue records. So based on my limited knowledge of setting up nameservers, the options I have are: 1. Transferring vconsult.co.uk to another registrar such as Fasthosts and setting up ns1.vconsult.co.uk and ns2.vconsult.co.uk with glue records. 2. Changing the hostname on my new VPS to use a Fasthosts hosted domain e.g. vs2.example.com and setting up ns1.example.com and ns2.example.com with glue records . 3. Using a Fasthosts hosted domain to set up ns1.example.com and ns2.example.com on the current hostname vs2.vconsult.co.uk For Option 1 I'm not keen in case the transfer results in a break in web/email services? For Option 2 I'm not sure if there are any issues with changing the hostname of the VPS, and would prefer to use my 'company' domain? For Option 3 I'm not sure whether nameservers based on 'example.com' can reside on vs2.vconsult.co.uk? Any advice appreciated, sorry if this is a bit basic for most on the list. Martin