Change of circs in 1st assessment period

Hi
Hoping for some advice as cant find the answer in my research.
I have a client who has no transitional protection included in UC but is worse off on UC compared to CTC.

Prior to claiming UC, client had CTC and widow parents allowance as income.
He claimed UC on 01/03/2024, deadline date for migrating was 31/03/2024.
However, client started self employment within that 1st assessment period on 19/03/2024.
Would the fact that he started SE have removed any entitlement to TE?

Or because the change was included in that 1st assessment period should he still have the TE?

Thanks in advance.
Paula

Income changes don’t affect transitional protection at all as long as the claimant remains entitled to UC after deducting the earnings taper (and even then the transitional element is saved for up to three months if they briefly “float off” UC).

The income will of course affect the UC calculation - the more they earn, the less UC they’ll get - but that calculation will still include a transitional element.

If there is no transitional element, that is because either he is not entitled to one for legitimate reasons, or DWP have got it wrong.  It’s impossible to say without some detailed figures, but the reason shouldn’t be anything to do with earnings.

Thank you. I suspect the DWP have made an error.