60 percent of Easyjets fleet is on the G Reg, you will need a UK part FCL license to work for Easyjet as a UK national out of the UK bases, as new issue EASA licenses are not eligible for the UK validation.
Wizzair UKs has its A320s on the G Reg.
So to work for Wizzair UK and Easyjet you will need a UK Part FCL License.
Unless you were a previously tagged cadet at one of the associated ATOs you wont have any eligibility to apply for Easyjet as a low hour fresh qualifier anyway.
The only thing getting a UK license rules out is Ryanair. But what you all forget after 2022 when EASA validations cease to be valid UK Airlines will only be able to employ UK Part FCL license holders. So with EU pilots no longer eligible to apply for work in the UK you may find you employment prospects may be quite good in the UK.
If you had a real interest in flying you would be thinking about flying opportunities outside the mainstream / lo cost airlines anyway.