The Government have issued new rates of Feed in Tariffs (FiTs) as of April 1st for Solar PV installations. The rates are more or less the same as they were in March, 21p/kWh for domestic properties, but they are now linked to energy efficiency standards.
All buildings the panels are fitted on must achieve Energy Performance Certificate grade D or above. This will be achieved on newer properties, but older properties may need more insulation to bring them up to the required level.
Rates of return for Solar PV are still good, if your building can meet the extra requirement. Two installers, Paradise Power and Plug in to the Sun are able to do installations of panels on Scilly.
Solar PV FIT Rates April 2012