Received UniversalUC leaflet Tax Credits are ending

Hello dear forum community and moderators,

I have received a Universal Credit leaflet “ TAX CREDITS ARE ENDING Get ready for UNIVERSAL CREDIT “
No letter came with the leaflet.

I find the leaflet misleading because it reads “ Tax credits are coming to an end and you will be asked to apply for Universal Credit instead “ and
It reads in red “ Your tax credit payments will stop” “if you decide not to apply for Universal Credit before the date provided in your letter.
It also reads in red“ To continue receiving financial support, you will need to claim Universal Credit by the deadline in your letter” that sentence to me could imply a letter came with that leaflet

My son received the same leaflet with no invitation letter. This looks like a generic mailshot to give all persons potentially affected advance warning.

There's a copy of the leaflet shown on the Benefits section of Martin Lewis website & further info in the discussion section of Rights Net.
It is just a warning to get ready for the Managed Migration letter which gives you 3 months to apply for UC or your benefits (not PIP) will stop. There is a final date given on the Migration letter by which time you must apply. Do not apply for UC before this without advice or you may lose any premiums from ESA. They are starting with single people on tax credits but are 'trialing'(terrifying?) a few people on legacy benefits as well.
I am trying very hard to put the migration to the back of my mind as it is unlikely to happen before 2024.

Dear fellow community members and volonteer moderators,
Thank you for your kind help.
I googled «  tax credit ending leaflet newcastle «  and found an interesting page all about this tax credit ending leaflet on rights nnet if you want to check it out.