I've just got home from work, which has taken me about 2.5 hours. Considering I live about 3 miles away, that's a really long time. Actually, my average speed was about 6 miles per hour because in that time I covered about 16 miles, probably ~6-8 of that is previously unmapped roads, and ~1 mile currently unmapped by Google.
I've also worked how a few existing roads join up, with some of the roads in between being easily done on my journey to work. Basically, it cuts off a mile of main road before I get onto NCN81, which takes me about 1/4 mile from work.
The battered fish fillets I bought from local shop are ridiculously expensive! £4.99 for 4, which turn out to be really tiny! Not impressed.
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