Many thanks for the replies. This is another option I found recently –
http://www.visitmyharbour.com/charts-for-seaclear.asp
A full set of UK charts for £30 – this enables you to use on a PC plus, in addition, one Android device. The print function has been disabled but I gather you can still do a screen print.
Off topic (and I should hasten to add I have no interest in fishing), but I came across http://www.tides4fishing.com/uk which is one of the better sources of future tide information I’ve found.
Jonathan