I believe this is what it looked like before it was extended.

(Postcard - mine)
The opening of the extension:

(Postcard - mine)
The extension cost about £12000.
The town's employers were instructed to close their businesses after breakfast on the day of the opening, so that after the Duke of Connaught had been wined and dined by the local worthies, the people could line the gaily decorated streets to see the procession. Unfortunately it rained, the heavy, sodden, cold, soaking Northern rain that spoils even the best of occasions and being November, everyone was chilled through to their bones. Sadly, they wouldn't have seen as much of the Royal visitor as they had hoped. The Duke didn't walk as planned from the town hall to the drill hall, he went by motor car. Doubtless he was gratified to be given the gift of a silver cigar case: as he observed, he possessed rather a lot of memento silver keys. He returned to Manchester on the half past three train to catch the London train.
For the people of Bury, the celebration day ended with a bonfire on the fairground and illuminations in the streets.
Gwyn