Thanks all - what a mine of information; really appreciate the input
I'd only considered pannier bag issues from the perspective of excessive depth causing them to drag on the floor; but of course heel clearance is another big one that I'd not thought about. Given the folding nature of the bike, obvious it can't be treated like a full-size ride where the bags can remain attached while the bike is not in use.. so obviously the attitude towards bags needs to reflect this and a pair (of even small ones) would probably be a pain to carry if they had to be removed every time the bike was folded.
I'm not usually keen on front bags from a handling / clutter perspective, but it seems that there's a lot of love for them on Bromptons; understandably so given the situation at the rear.
From a commuting perspective I'm torn with luggage.. I usually have to carry a laptop bag and also have a "daily" rucksack full of the usual anxiety-driven boyscout provisions (which are genuinely useful tbh!). When I'm on the bike I have a specific Osprey rucksack. I don't want the hassle of swapping daily stuff in and out of the bike rucksack, while I don't want to carry the daily rucksack on the bike as it will result in a sweaty back. I'd rather keep the laptop bag separate if I can since again, transferring its contents repeatedly to and from a rucksack will get tired quickly..
Since my daily rucksack needs replacing anyway I was considering something maybe more bike-friendly (unfortunately however better breathability means less room), while ideally being able to mount the / a new laptop bag as a whole somewhere on the bike.. meh, something that requires more thought evidently.
I appreciate the thoughts on security - personally I never leave stuff locked up for any length of time (expensive gear never, cheaper / utility stuff for as little time as possible) and would feel very uncomfortable doing so with something as thievable / prices as one of these.. so I'd aim to fold it and take it with me wherever possible.. which most of the time shouldn't be a problem I guess. I imagine it could be a bit of a pain if you're in and out of shops all the time..
A lot of the suggested upgrades make sense; however I remain torn between both ends of the spectrum - cheap and tatty as better befits utility riding or expensive and shiny because I'm a tart and we all like nice things. This transfers to the wear too; part of me wants to get a minter and cover it in helitape; part of me wants to get something already well-worn that I'll be less precious about. I can deal with wear; damage less-so.. and appreciate that by the bike's nature it's likely to pick up scratches etc.
I nearly chucked a grand at a nice-looking example on
ebay last night; however information was not fourthcoming and I'm increasingly resentful of how draconian ebay are - essentially prohibiting you from viewing big-ticket items before buying for fear of losing their fees..
Meh, who knows. I remain really keen on the idea of a folder and tbh the thought of avoiding the vile stop-start, significantly-longer-than-it-should-be commute is intoxicating; but currently I haven't had the opportunity to look at / buy anything suitable. I'm getting a bit more familiar with models and used pricing; most stuff for sale seems unsurprisingly to be in London; which on the one hand isn't a million miles away, on the other is a pain to get to and typically commands a premium on prices.
I'm also aware that while a folder would potentially be handy for many reasons, realistically I'm only likely to commute on it during the better half of the year; and potentially will have less of an incentive to do so during the school summer holidays as the traffic usually seems to be fine when the bloody kids aren't at school (although it's ruined currently by roadworks en-route). Of course traffic avoidance isn't the only reason to cycle; however the fuel saving would be relatively small and the time saved by remaining in the car on a clear run might be preferable..
Just thinking out loud / for future reference (and in the absence of anywhere more appropriate to put this)... Ideally the commute in the car, via my preferred route is about 22 miles and 35 minutes under optimum conditions; costing about £6.40 daily in fuel for the round trip; assuming 45mpg and £1.45/litre.
Currently, thanks to sodding roadworks compounded by the bloody school run traffic the commute is a shade more than 27 miles and an hour; so around £8.00 in fuel for the round trip.
The optimium approach with a folder would seem to be to dump the car as close to the city as I can get whilst avoiding the traffic, then cycle the rest of the way predominently on the tow path. This would be a 13.5 mile car journey (so around 20 mins and £4.00 in fuel round trip) plus an 8 mile ride that Google slates at 45 mins; so probably a total journey time of 1hr 10-15 mins once the faffing of sorting the bike out has been taken into account.
So... comparing the "hybrid" commute against the best-case car journey gives an increase in travel time of around 40 mins from 35-75 minutes or a bit over double, and a decrease in fuel cost of £2.20 or around 35-40% from £6.40 to £4.00.
Conversely comparing the bike-based commute to the worst-case journey gives an increase in travel time of around 15 minutes or maybe 25%, while fuel cost drops by around £4.00 / 50%.
Of course this is broad-strokes and doesn't take into account less quantifiable factors such as wear and tear on the car and bike, differing real-world fuel economy due to driving conditions or the effect on either on my mental and physical health. Under optimum driving conditions I think there's little incentive to add the cycling; however it makes for a pretty compelling choice compared to the hell I'm currently enduring.
As it stands I think I'll just sit on my hands and see what comes up locally - perhaps leaning back towards something older / cheaper just to dip my toe in the water and see how viable it all feels in practice.
Thanks again for all the input; appreciate that I've gone off on a rambling tangent and I don't expect people to respond directly to any of this
