New bicycle for commuting I'm just retiring my old roadie and looking to buy a new bike, and am torn on what kind to buy.  

I cycle 34 miles per day on my commute, down roads and canal towpaths (which are bumpy and have on several occasions wrecked the wheels on my roadie).  I also like going out on long leisure rides.  For that reason, my initial thought was that I should get a touring bike, which would be able to handle the potholes I encounter daily.  

The other problem I have though is that I have no proper outdoor space to clean the bike, and this has caused many issues with my roadie (which doesn't have mudguards), which got super gummed up.  I have taken it up on the roof through a window to clean in the past, but its a bit of a pain.  I really like the idea of an internally geared hub, but I can't find any touring bikes within my budget (£1000) with one.  I did find the boardman URB 8.9, which looks really nice, but I'm not sure if flat bars are going to be a problem on longer rides.

I really don't know what to do, please help me!
I had experience with riding of different bicycle types for commute, my distance was around 20km per day:


MTB: tires are bad fit for the job, so you put on slicks, running out of gears on asphalt flats/descends, sitting too high, too wide bars, extra weight from the fork. Makes sense only if you ride offroad for a major time of your commute, like one of my colleagues does.
Cyclocross: not bad, more aggressive geometry than road bike works fine for 10km ride but may be a pain for a longer one. Tires work both on asphalt and outside of it. But CX bikes are usually not coming with mudguard mounts, and tire clearance is usually limited to 35-37mm (due to 33mm official CX limit by UCI).
Road Bike: works great during the summer for longer commutes or when the weather is dry. Gets you to work ASAP. Many positions available on the handlebars. Slicks are getting not much grip when it's +3 and wet. Not much practicality bonuses, so the extra cargo most likely is going to be carried on you. There are some &lt;1000GBP options available with mudguards (like 2019 Specialized Allez), but with bike's price increase mudguards are getting quite rare. Rim brake versions are quite easy to maintain in my experience. Not the best choice when you get into cycling traffic jams. Can use more robust rims with more spokes plus universal set of tires like Conti 4 season to get it almost bulletproof (remember Martyn Ashton's Road Bike Party showing you what road bike can handle). I use this option during summer when I also want to involve training ride before/after work or get to work very fast beating some Strava segments.
Gravel Bike: take pretty much all of the advantages of a road bike and deduct disadvantagess like lack of mudguard or rack mounts. With clearance up to ±47mm you can have comfortable solid tires fit in without sacrificing much speed. Unfortunately hydralic disc brakes for drop bar bikes are still a luxury, unlike flat bar bikes where it's more or less standard over ~400GBP. Can be used as a tourer too, plenty of bags are now sold designed for gravel bikes backpacking which could also be useful for commute. Expected to be lighter and faster than proper tourer. My friend rides around 40km a day on a steel Vitus 650b gravel bike and loves it.
Hybrid: my new love. Bought one to replace carbon gravel bike which I believe is too much for winter conditions and only 13km/day commute (after moving to new place my commute distance got shorter). Comparing to gravel bike you get much higher riding position, which with other factors like increased weight makes me around 20-30% slower. Also the fact of not riding a fast bike helps to take things easier, I started to ride to work in jeans with flat pedals again. Having a hybrid bike I don't need to be one of weight-weenies, so I have mudguards, solid rack and a waterproof bag which make my life so much more comfortable. Flat bar works for a short distance but when I finally leave the city I really want to sit lower to make it easier to maintain higher speed. Not talking about comfort, your hands will be in the same only position for few hours daily. Hybrid bikes are usually quite cheap so I can finally park my bike outside and use for things like buying grocery. I think most of the stuff said about Hybrids applies to Tourers too.




Reliability of components


If you're able to find within your budget a bike with hub shifting - may be worth considering it. But without sacrificing the shifting abilities, because unlike other commenter here I believe that number of gears is important if you live in a hilly area. Otherwise I wouldn't bother. Sora and Tiagra levels are currently decent enough to use them hard and expect reliability to be high and maintenance to be quite easy. Spare parts are available everywhere (including second hand in mint condition due to many people upgrading from 9/10 to 11 often shortly after buying a bike) and are quite cheap. Here in Stockholm I see plenty of people riding cheap hybrids with basic Shimano groupsets and seems that they've never washed or serviced them, but they are still running.
Mudguards are actually making significant difference to how your bike is feeling and what's it's resource.




Conclusions


For your distance of commute I would definitely look for a drop-bar gravel bike with wider tires and something around Tiagra groupset. I believe that hybrid would be too slow for your use and works best for up to ~30km per day. I have much shorter distance and went for a hybrid which works very well too.