So you don't have the right to work in UK such as EEA passport? Then it will be very difficult. First question 99% of employers will ask is, 'Do you have documents to show you are allowed to work in UK?', and if you say no and you need visa sponsorship, they won't be interested. Your only realistic chance is intra-company transfer by your existing employer, or if you are in a highly specialised field with great demand (in which case you already have UK contacts). If you are a qualified nurse, some nursing homes may be willing to sponsor you for a visa.