• Sealey 300NM Torque wrench for one shot hub nuts
• Sealey battery tester
• Testo flue gas analyser
• Truma/GOK gas pressure tester (with Clesse adaptor)
• Rothenberger manometer
• 2 Tonne and 3 Tonne trolley jacks
• Axle stands
• Professional damp meter
• RCD Tester
• Earth loop tester
• Continuity and insulation tester

And I already had a massive tool kit!

They don't make a tester for caravan electrics so I made my own