The scaffolding is gone and the solar panel project finished. We went with IKEA because of the brand, but their prime contractor is Hanergy, who did a great job. Local subcontractors were yourenergyuk and the scaffolders. No significant problems and recommended in particular for good customer care.
Twelve panels @ 120 Watts (peak) = 1.44 kWp
On a couple of sunny days recently we have seen our electricity meter going backwards!