Use agency for Tier 2 G visa first and later transfer to newly established company?

Dear all,
I found this forum very useful and lots of insights.
I haven't seen a similar situation and would seek your expertise.

I'm discussing with a company on employment, and they don't have the legal entity in UK yet.
They said they plan to use agency / other company to recruit me and sponsor my Tier 2 G visa first, and later they will start process of establishing their legal entity in UK, and when it's done they will transfer me to the new company.
Is this a feasible process? Any catch?

Thanks a lot.

Tier 2 General doesn't work like that.

You can only be sponsored by an HO licensed Tier 2 sponsor on the official HO list of sponsors.

Note also that you cannot 'transfer' a tier 2 general to another employer.

Are you being asked to pay a fee for a CoS??

Thank you CR001, no they didn't ask me for fee for CoS.
The company A (not in UK yet) said they want me to start work first, because registering a new company takes time.
that's why they want another company B to sponsor my visa first, but actually I will be working for A.
When A has their UK office ready, they will change me to A-UK.
Do you think there's some problem with it?

The company A (not in UK yet) said they want me to start work first, because registering a new company takes time.
that's why they want another company B to sponsor my visa first, but actually I will be working for A.

It doesn't work like this. You can only work for your sponsor. You cannot work through a third party and contract etc. Only your UK Employer whose PAYE payroll you will be on, can sponsor you.

When A has their UK office ready, they will change me to A-UK.

It doesn't work like this either. You can only be sponsored by an employer who has a valid sponsor license and who you are going to work for directly, i.e not through a third party. It cannot simply be 'transferred' from one employer to another employer.

Do you think there's some problem with it?

Yes.

Thank you CR001.
From what I understand from them, they want to ask company B to sponsor me and also pay me first. But B will report to overseas company A and A pays B a service fee.
When overseas company A establish their affiliate in UK and get sponsor license, A-UK, I stop the employment with B, and starts new sponsorship with A-UK.
They said it's just a time concern, because they are not sure how long it will take until their affiliate is fully ready, especially given the current situation. But they don't want to wait a year before starting their business.
Do you think this is a plausible logic?
Thanks a lot.