This is the list from Clearing 2019 - the unis in Clearing won't necessarily be the same in 2020 but it gives you some idea:
Warwick and Durham not in Clearing
Bristol not in Clearing for home students (Adjustment at A*AA with no LNAT)
Nottingham had a handful of places in "early clearing" at AAA (plus LNAT) but by 10am on A level results day, it was International only
Birmingham AAA but places filled by 10am on A level results day
QMUL LLB vacancies at AAA
Sheffield LLB vacancies at AAA/AAB
Newcastle LLB ABB
Southampton LLB vacancies ABB (reportedly accepted BBC)
Cardiff .....ABB (reportedly lower) vacancies not published until A level results
Exeter vacancies for LLB at BBB (or BCC with Business) at Penryn
(those who missed their offer by even one grade got revised offer at Penryn)
Lancaster LLB vacancies BBB (BBC by the end of day 1 then full)
Queens Uni Belfast LLB ABC/BBB
Leicester uni LLB vacancies BBB, reportedly accepted ABD
Liverpool LLB only in early Clearing for those achieving around BBB/BBC
SOAS BBB/BBC
Surrey LLB vacancies at BBB/BBC
Sussex LLB vacancies at BBC
Kent LLB vacancies at BBC
Keele LLB vacancies at BBC
Sheffield Hallam BBC
Aston LLB Law & Management BBC
City Uni LLB BBC/BCC
Reading reportedly went down to BCD
UEA, RHUL, Keele, Swansea, Hull LLB vacancies (grades not known)
Oxford Brookes LLB 96 UCAS points