Please clear my confusion. I have been selected for a contract job in UK. Employer has applied the Cos and it got approved and Last week I have submitted all the docs to get visa from VFS.
This week I got a new job for permanent role. Employer is planning to apply the CoS. I have not informed my new employer that I have already have a CoS from another employer.
How can I go about it now. Can I travel to UK once the visa is approved or need to inform my Contract Role Employer to withdraw my Cos and ask my new employer to apply for Cos.

Please experts need your help