Neil Scales, chief executive and director general of Merseytravel, said:
'It's worth one last throw of the dice for a£311m transport and regeneration scheme.
'We don't regret having to take this action although it is more in sorrow than in anger.
'But there is an important point of law at stake, which affects not just Merseytravel but every PTA in the country. For this reason alone we must appeal.
'But more importantly the people of Merseyside deserve their tram.'
Background DfT FACES COURT OVER BLOCKED TRAM PROJECT