Alpkit do some brilliant gear, but, often, you have to be quick before they disappear! Last year I bought a Presta 20 rucksack for day walks to replace my Osprey Talon 22 (mice had chewed one of the shoulder straps). I used it in September in the Lakes and again in January. I found it to be a great day sack. It was very comfortable and just the right size. Unfortunately, Alpkit appears to have discontinued it.
I added some Tread Lite Gear hipbelt pockets (the ones on the sack are a bit small) and a shoulder strap bottle holder. With those additions, it’s a fabulous little pack. It’s not particularly light at around 625g but you hardly notice it on your back. Hopefully, Alpkit will reintroduce it again in the future.