A new idea for this season is the Ridgi-Dome roof insulator. This canopy fits over the central roof section of your tent and does two things; it will significantly reduce the temperature inside the tent on warm/hot days and overnight will help reduce the condensation levels you will find the following morning (after a curry the night before). 

RRP: £25
Steamy!
Megastore Price:   £19.99 (€25.39)