...but I humbly suggest this is a wider problem than winter maintenance or a few cycle tracks.
Absolutely agree - don't think we see anything particularly unique around our parts - other than perhaps the sheer number of cycles on the roads on a weekend.
Also just remembered that on my morning commute in, I very often overtake one of those mini street cleaners - it's never in use at that time, more appears to be making its way into Kingston (from where I don't know but often encounter it around Thames Ditton). It's the perfect size to run along and clean a cycle lane... but I'll give you good odds that I never see it in use on the Portsmouth Road stretch of cycle lane - even though it appears to run down there most mornings!