The 4m band is now widely available in Europe and in a few places worldwide. I have not tried the band from this QTH, well not yet. There is now the IC7300 which includes 4m in the European version. With 50W and a simple antenna, most of the UK should be reachable on CW or digital modes and a lot of the UK on SSB.
There is a new Greenland 4m beacon OX4M on the air from HQ90AL on 70.047MHz (25W) into a dipole radiating North/South sending PI4 + CW + carrier.
Years ago I remember working Greenland with QRP SSB on a whip antenna from my garden using the FT817 on 15m. This new beacon should be ideal in the Es season.
See www.70mhz.org .
Incidentally, I see that Southgate News has a report on WIA's attempts to get a 4m band in Australia.
See http://southgatearc.org/news/2016/november/quest-for-australian-70-mhz-ham-radio-band.htm#.WDwwZ4XXLIU .
Remember, you heard it here last 😉 .