Low-usage community groups - should they have a low-cost option to avoid the 40-minute limit?

I run a non-profit unfunded community group in the uk.  We currently have a once-a-month meeting which is hampered by the 40-minute limit.  We would love to have a low-cost means of having a longer meeting at this low usage level.

Is there already an option to do this?  If not, should there be?