SQE preparation courses or Accelerated LLB?

You have a foreign law degree so you just need to do the SQE1 and 2 courses and exams. So in my view number 1 on the list is the best choice. The LLBs are not likely to make much difference unless they were from Oxford or Cambridge.

You may want to apply for a training contract/QWE at law firms now in the hope they will pay for your SQE1 and 2 courses and exam fees and then train you for two years.
Good luck.

Most bigger law firms will want you to have a course like the GDL (now being called the PGDL) so yes the GDL is a good idea. The GDL 2 of my children did this year at BPP includes preparation I believe for the SQE1 type questions too so I am sure places like University of Law (your no.1 above) and BPP in September 2021 will be offering a PGDL course which includes preparation for SQE1 exams which you could then take presumably in summer 2022 after finishing the PGDL. There is a useful video on youtube form UoL about the SQE exams - https://www.youtube.com/watch?v=Nz-Y_-74beE

This looks like a new 42 week course from UoL to prepare you for both SQE1 and SQE2 in one year https://www.law.ac.uk/study/postgraduate/law/llm-sqe-1-and-2/ whereas your link 1 above seems to be just for SQE1 but I may have got that wrong.

It is all very new for everyone so I am not very sure about all the new courses.

The status of institution for the SQE and GDL/LPC now does not matter as it is not like your first degree institution. In the old days only the College of Law (university of Law) was allowed to offer these professional law courses (in Guildford, Chester and London only). That then expanded to others and now the big law firms in London mostly use BPP and a few University of Law. So if you want to be with others going to those best firms one of BPP or UoL is usually best in my view.
Nottingham Trent was one of the first to offer these law professional courses however in addition to the College of Law so it is certainly not a bad provider at all. However its general status is it is an ex polytechnic unlike Nottingham University so the status of Nottingham Trent is not high BUT its professional law courses are very good. It will not enhance your CV to have been there in the way that a first degree from Oxford University might.

Of the three on your list only University of Law is one larger firms choose to train their future trainees.
However these are hard questions to answer as no one has sat SQE yet. No one knows what law firms will prefer (other than looking at their websites - they seem to plan to send people to an SQE1 course and then exam and the next year the SQE2 course and exam so could take about 1.5 years I suspect and after that you do the 2 years training in their office (so a bit like GDL and LPC years now) The reason I mentioned the UoL one year for SQE1 and 2 if I am right that course exists is it sounded like a good institution and an efficient way to get both parts of the studying and exam done within 44 weeks.

I am not an expert. I am just a lawyer who happens to have 2 children about to start the LPC so I became a bit interested in the new SQE courses.

(........Although 2 of my children studied at BPP and the youngest 2 are doing so now at BPP so I am certainly not on the payroll of UoL! We chose BPP over UoL first because to the extent they were sponsored the bit city law firm chose for them - BPP and in cases with no sponsorship felt BPP had the edge over UoL although it is a close run thing.)