The picture is of lightweight glass QCells for use in pitched or flat roofs; or vertically.

Solar Cells divide into two categories:
Solar PV (photo voltaic) for producing electricity.
Solar Thermal for producing hot water.
Solar PV can be divided further into:
Mainstream glass and silicon -based modules for pitched roofs.
Or thin lightweight panels for a variety of applications.
  We do not offer mainstream panels.
  We have a number of types for use either as permanent, pitched, flat or curved roof arrays,or for vertical applications;or for portable use in a number of ways.
For more detailed information look at the categories shown below.

Solar Thermal can be divided further into:
Mainstream flat plate collectors for pitched roofs.
Or Evacuated tubes for use in a variety of applications.
 A very general assessment is that mainstream pitched roof situations are best  served by glass-based PV modules and flat plate collectors, expressed as lowest capital cost for given output.These are now supplied by a number of large organizations
We recommend studying these sources for all types of panel:

solar-trade.org.uk
realassurance.org.uk
which.co.uk
microgenerationcertification.org.uk
Sunday Times Home Supplement 26.06.11

Outdoorstuff is NOT a supplier of mainstream modules.