Add spaces: Itisthereforeimportantthatmaterialproducerscanguaranteethattheirgoodsbehaveconsistently.

Answer: It is therefore important that material producers can guarantee that their goods behave consistently.

Add spaces: Price:£15perhour;£55for4hours;£90perday(withinbuildingopeningtimes)

Answer: Price: £15 per hour; £55 for 4 hours; £90 per day (within building opening times)

Add spaces: Theideaofworkingartisticallywiththisgablewallarose.

Answer:
The idea of working artistically with this gable wall arose.