Thanks to all who responded so kindly to my previous message. The weather forecast last night was giving us 50+ mph winds for anything after about 8am today, so I set the alarm, laid out the kit and was out the door by 7am. The sun was shining and the wind was howling, but fortunately no rain. As stated previously, we have just moved into a VERY hilly part of Wales (is all of Wales this hilly? not sure) so I knew there was going to be a lot of walking involved.
My new route starts off with a gentle downhill section, then a bit of gentle up and downing, then a mahoosive uphill which I don't think even mountain goats would try and run up, then a gentle long uphill then a lovely long downhill back to my house. The views were spectacular, I didn't see a single vehicle, I did see a lot of sheep and cows (scaredy cat bullocks who were fine when I was walking, but who ran away when I started running - did I make the ground shake so much they thought an earthquake was imminent?). The wind was wild, but didn't blow me over and I was actually assisted up a bit of the long slow hill by a tailwind.
Anyway, the upshot is I DID IT after months of relative inactivity, and now I ache like hell.
Thanks to all here who encouraged me. You guys are awesome!
The next challenge is to repeat this on Monday (next available opportunity, but it will probably take till then for the muscles to recover anyway!).