Complex sentence: Interest in the YBAs was growing, but there was a shortage of established dealers, and Compston opened Factual Nonsense at 44a Charlotte Road in Hoxton, which had become the centre of the emerging YBA scene.
Split into simpler sentences: Interest in the YBAs was beginning to take off but as there was a shortage of established dealers. Compston saw an opportunity and opened'Factual Nonsense' at 44a Charlotte Road in Hoxton which had become the centre of the emerging YBA scene.