Thanks again for your suggestions. I still can't find anything that works well enough.
I think i will stay with my garmin Etrex or get a dongle for my HP Tablet hwen it is required. On the subject of dongles, what is the best, with regards to cost ( one off or monthly ), and data amount. Does the data end when the month ends, or is there no time limit on usage ( can i "dip in and out" ) until the cost has been used up.