Thanks for the Topy comments. I have tended to have them fitted to more casual shoes but have not done so where more 'formal' styles are concerned.If the day comes when, despite the protection afforded by the Topy, you need to send the shoes back to the manufacturer for a re-sole is there any penalty to pay financially or otherwise?
You're in luck as you're in England which makes it so much easier to get it rebuilt. Us poor sods from across the world have to stump nearly the price of a brand new shoe just for that (if we can dare to pull the trigger, hence one reason for the topy as wurger said). But yes, some manufacturers (don't know which) do not entertain resoling/refurbishing if work has been done on the shoe by others.
Loake's little book (which comes with the shoes) does mention not to put an additional layer on the sole but silent on whether they do refurb regardless. A bit silly in my book as it is still a customer for Loake. After all, if the customer is willing to pay for it, it makes good business sense to do so. May be worth asking Loake directly, they're quite responsive from experience. Then you can let us know here
Some would argue putting a topy would make the leather shoe look ugly and would beat the purpose of getting a leather shoe with a leather sole in the first place. It's a matter of perception really and what's acceptable to the end-user.
Interesting... That would mean slightly lower quality leather for the Shoemaker line then.