An enrolled deed is much more expensive in cost (£42.44) plus other additional fees such as Solicitor fees. Also an enrolled deed poll is more complex and time consuming, it can take from upto 6 to 12 weeks to complete. There are no legal requirments to enroll your Deed Poll it is totally optional.
An Un-enrolled Deed Poll means that your Deed Poll has not been voluntarily registered (enrolled) with the Royal Courts of Justice. It is a cheaper option (£15.00) and takes only a couple of minutes there is no need for a solicitor or no other additional fees are incurred ,
All UK organisations, including HM Passport Office and all other government organizations accept Un-enrolled Deed Polls.