In reply to Philip:
I find the fabric shoes are too lightweight. Nowadays I use a mixture of hill-walking boots with vibram soles when the ground is muddy, and approach/trail shoes with thin, soft leather uppers and thin vibram soles when the ground is dry. (If in any doubt whether the conditions are going to be muddy, or not, I wear the boots.) I walk almost every day of the year, averaging about four miles a day. By spreading the wear between boots and walking shoes, they both last many years. My current shoes and boots are four years old and still look barely half worn. Good makes for hiking/trail shoes that fit my feet are La Sportiva and Scarpa, which are incredibly comfortable. I use the same footwear for hiking in North America, e.g., in Yosemite as in the UK. The trail shoes I used yesterday to walk in the Chilterns were the same ones I used to hike up Half Dome four years ago.
The only times I have had boots fall apart have been in very hot conditions (I mean 40+ C, not what many people call hot in the UK), when the soles have literally become unglued and fallen off - that happened to me on two occasions, one in Joshua Tree and the other in Texas with apparently good mountain hiking boots. (Of course, I am not talking about the rock climbing shoes of the "good old days", such as EB's, which always rotted and fell apart, nor those incredibly heavy and sturdy leather mountain boots, which would probably survive a nuclear blast!)
Bottom line: IMO, it is highly worth paying 100+ pounds for boots or shoes that last many years, rather than 50 quid for pairs that fall apart after one year. Boots are about the only piece of outdoor gear (apart from climbing gear) where I think it is worth paying for premium brands; for almost everything else budget stuff (e.g. Decathlon) is perfectly adequate. For example, one absolutely does not need expensive gear such as Alpine mountain jackets for everyday use.
Post edited at 16:54