As a follow up to my last post in here, I found some "holes" in that last OSM download of the UK and I travelled into one of them when I used the Garmin last. When downloading the 250 Mb I noticed some "tiles" within the UK were not showing on the website, but gave it no further thought.
Sure enough, when I physically travelled toward one of these, the map more or less disappeared (but one major road did stay in the display although it was not plotting correctly - I know this because I was on it at the time).
When I went on a bit further, the full map re-appeared on the Garmin, presumably when I got back onto a tile.
I am now downloading again, and this time the download is 337 Mb and it seems to have tiles to cover the whole of the UK.
Oh, the joys of computers.
ps And it unzips at well over 400 Mb, but, hey, the whole world is only about 330 Gb
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Dave
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