Alan Bennett Fund Raising for Lawyers

I have commented before that Alan Bennett is probably unaware that the proposed challenge to Brent Council's Libraries Transformation Project is more likely to reduce library services in the Borough than help them.  The appeal for funds suggests that a legal challenge that is unsuccessful will be lead to funds collected contributing to legal aid costs.  If the challenge succeeds, they will seek as much of the cost as possible from Brent Council, presumably at the expense of other Council services.  However, I wonder what will happen if they collect some money, but not enough to actually mount a challenge?  Where will the money go then?