Checked the wp-settings.php file for memory limited and it was set to:
define(‘WP_MEMORY_LIMIT’, ’64M’);
Changing the memory limit to the setting below resolved the problem – though slightly concerned why this was necessary and the impact for the future.
define(‘WP_MEMORY_LIMIT’, ‘128M’);
We are intending to upgrade the BB version so thanks for that – its at 1.2.3 I believe