Members of Broxbourne Council's Planning and Licensing Committee toured NI's northern production site, which is near Liverpool.
A statement from the council said that the trip "would enable members of the council to assess, at first hand, a similar existing plant" to the one planned for Waltham Cross's Park Plaza, which will replace NI's infamous Wapping site.
Local residents are waging a fierce campaign against the new plant, which they fear will be noisy and will devalue property in the area.
Maria Mendrys, of the Park Plaza Action Group, was angry about the trip. "No one on the planning committee has approached us regarding our objections. Perhaps I should invite them to a tea party," she said.
Objections from residents have already forced NI to revise plans for the site. A decision is expected on the plans at a planning committee meeting next Tuesday (2 August).
Story by Josh Brooks
Have your say in the Printweek Poll
Related stories
Latest comments
"And here's me thinking they bought the Docklands Light Railway."
"15 x members? Why don't they throw their lot in with the Strategic Mailing Partnership (SMP) and get a louder voice?"
"Some forty plus years ago I was at a "sales" training seminar and got chatting to the trainer after the session had finished.
In that conversation he told me about another seminar he had..."
Up next...

Further breathing space
'Serious group' interested in Highcon, new deadline set

Automation welcomed
Colourbridge enhances efficiency with new Duplo multi-finisher

New business unit includes OpSec