How to read the charts

The chart shows the best frequency to use if working from the UK to each area. The dark green (squares) plot shows the optimum frequency and the light green plot shows the next best frequency to use. The dark green blob plot shows the reliability of the path as a percentage that it is likely to be open.These are based on CW, 100W, dipole to dipole and a "fair" reception. Adjust the reliability according to your own station.

For more general charts see http://www.infotechcomms.net/propcharts/

Iceland

Reliability/Band graph produced by WinCap Wizard/VOACAP
This shows that to work the Iceland station from within the UK, 40m (7 MHz)
is probably your best bet from around 0600UTC to1000 UTC
and then again in the late evening/night.
20m (14 MHz) is a possibility from 1000UTC until 2000UTC,
with an 80% probability . Do check 10 MHz too -
I have never heard IMD stations operating on 30m myself.