Hi!!
I genuinely gave up with childcare grant because you had to jump through so many hoops to get it!! It was easier to use 15 and 30 free hours than it was use the childcare grant! They literally wanted blood sweat and tears to get it! My uni even tried helping and I gave up, worked two part time jobs (my husband and i are still together and we reallllllly struggled financially, many evenings without proper food for me so my son had something) I genuinely think the system is flawed. We have never been eligible for UC but a friend of mine was and she had to stop her UC to then become a student as you cant have both. So she ended up losing out a hell of a lot, she was a single parent too and had to do a swap with a friend and her mum over who has the kids on what days!
I used my 15 hours and 30 hours when he was old enough. Before that, i paid for a private childminder out of my normal loans, using the part time jobs for bills mortgage etc together with husbands wage. They make it so hard for mature students and they wonder why there arent as many of them! this is why!
Good luck! I would suggest, looking for another job you could do, getting friendly now on the uni page with mature students with kids etc, hiring a childminder as they are a lot cheaper than nursery and way more flexible with hours. My son used to go to my mums from 7am - 8.30 and she would drop him at childminders from 9 - 6 and some evenings it would be 7 if traffic was bad, or earlier some days! I started doing evening shifts for work and she would take him then for me! So i would definitely look at a childminder. Mine would even pick him up from mine if i didnt have the car etc!
I made it through and did masters and now im working full time. You will get there in the end but it is bloody hard!
good luck ! x