The turbulent market for mid-tier practices propels some firms to glory while punishing the flat-footed and unlucky. Alex Aldridge tells the tales of success and woe from firms outside of the UK top 50

Sitting just off junction nine of the M27 between Southampton and Portsmouth is the unglamorous Segensworth business park, where for the last two years Blake Lapthorn – the 60th largest law firm in the UK – has paid £450,000 to rent vacant office space.