UC and SDP

Getting different answers from DWP/TCs
Client on cbESA (support group) ib ESA top up as SDP, HB, moving in with partner who has two children, earns about £1200pcm and gets CTC.
Question is can she now claim CTC as a couple with him because of the SDP being in payment up to the point he moved in with her?

Reg 4A of the Universal Credit (Transitional Provisions) Regulations 2014:

Restriction on claims for universal credit by persons entitled to a severe disability premium
4A. No claim maybe made for universal credit on or after 16th January 2019 by a single claimant who, or joint claimants either of whom–
(a) is, or has been within the past month, entitled to an award of an existing benefit that includes a severe disability premium; and
(b) in a case where the award ended during that month, has continued to satisfy the conditions for eligibility for a severe disability premium.

Your client doesn’t meet (b) so it doesn’t apply.

And always worth pointing out that, all other factors being equal, they don’t want to claim CTC as a couple, they will get more on UC and especially this year.

Edit: ah no wait a minute, she works, so scrub the part about this year.  But generally, in any year, the LCWRA element is better than Support component + EDP and working renters tend to do a bit better on UC as well.