City firms are becoming stronger converts to the pro bono cause, but conservative Brits still cannot quite get used to the US example of firm-wide ventures and hourly targets. Caroline Grimshaw reports on the latest Big Question survey

More than 70% of City-based law firms have increased their pro bono commitments in the last three years, as the debate rages on over whether dedication to charitable causes is a cynical publicity ploy or an opportunity not to be missed.