I used GTS in Bournemouth. 2 Modules with 2 weeks consolidation each = 4 weeks. They also replaced much of the module 1 consolidation with 1:1 tuition on more convenient days and one week-end, but that did cost a bit extra, naturally. That wasn't possible for Module 2 as the strucure of the consolidation course did not permit it.
In total I had to take 3 weeks and 2 days off.