I probably should keep out of this thread (given what happened last time) but my first response to this is .......

Good idea to change the date and put out some publicity

BUT

Who Events And Exhibitions Ltd ? .... couldn't find any info on the net other than that they have a full committment to model trains .... and the name seems uncomfortably similar to the last organisation.

Who is booked? ..... by this time contracts should have been exchanged?
Are they likely to attract any of the big names they had on the bill last time?

Who is the contact for , Artists, Stewards, Stallholders?

Given last years fiasco - with people still being owed money - is there enough goodwill to get this event off the ground??