Usually - laptop type bag containing:

• Fire extinguisher
  
• 1st Aid kit
  
• Maglite
  
• Small toolkit with bare essentials - torx set, screwdrivers etc
  
• Spare bulb kit
  
• Tyre compressor
  

And loose:

• Reusable shopping bags
  
• Hi-viz jacket
  
• 2x travel rugs
  
• Skoda Rally Team umbrella
  
• Luggage net
  

But at the moment add to that:

Full suspension setup

Rear ARB

4No. Laptops

Box of various bulbs and small modifications to be fitted

Bury 9060 carkit, which I need to fit

a hi vis vest

a flat cardboard box

some screen wash

an umbrella (in that bit on the roller cover thing)

a spare pair of socks

gloves and a hat.....

fold up picnic seat

and some bits of sand from the beach