Law Society also asks for the restoration of the 'two free cases’ rule for firms under investigation.
Three day hearing set for March in 55,000-claimant group action case over emissions test scandal.
Company says figures reflect 'robust' legal finance market.
Lawyers who make it their business to sue law firms over deductions from clients’ damages have insisted they are acting legitimately amid growing controversy over the practice.
The government has been accused of jumping the gun by spending millions of pounds on IT projects and management consultancy ahead of parliamentary approval.