Key business case figures, obtained through a Freedom of Information request, have been obscured by the council citing "commercial confidentiality".
Volunteers helped to create the woodland next to the Northgate End multi-storey car park.
The new wildlife haven is next to the site of the council's multi-storey car park and four-storey building housing businesses and 15 flats.
East Herts Council confirms end for Water Lane United Reformed Church Hall but Tories and Lib Dems to work on a substitute.
Critics say a £6m grant and £3.6m interest-free loan came with conditions, including a requirement that the development includes a 'theatre'.
Planner and urban designer Yvonne Estop-Wood outlines her objections to the proposed revamp of Jackson Square to accommodate TK Maxx.
The development management committee has approved plans to make Hertford Theatre "a beacon of sustainability for the county and for theatres".
Leader Linda Haysey defends East Herts Council's decision to go with a cinema-led arts centre rather than a theatre auditorium.
Cllr Mione Goldspink said: “I was really shocked to hear that the Tories were planning, quite deliberately, to destroy a valuable community asset."
Group lobbying for FE college rather than arts centre on Bishop's Stortford town centre site condemns East Herts Council.
The council's deputy leader Cllr Geoffrey Williamson said "extraordinary circumstances" had forced drastic changes to the arts centre project.
The Old River Lane working group is lobbying for the entire scheme to be replaced with a further education college and launched an online survey.
Bishop's Stortford Arts Forum's letter to all 50 East Herts district councillors ahead of Thursday's crunch extraordinary meeting.
"Council has not carried out any analysis of the extent to which its new version of the ORL scheme will have an adverse impact elsewhere in the town."
Colin Woodward secured pledge to relocate stone elsewhere in precinct ahead of Bridge Street works to accommodate new TK Maxxt.