I've just treated myself to an HTC Desire HD. I now want to get rid of quite a lot of the bloat that comes pre-installed. E.g. things like HTC's 'Stocks' widget which isn't visible on the Market and doesn't have an Uninstall option on the handsets Application Manager.
My googling around has lead me to the conclusion that to do this I'll need to root my phone and consequently invalidate my UK warranty. Is this correct or is there another way?
You can also attempt to go directly to Settings>Applications>Manage Applications and see if you can uninstall from there. If not, those HTC things you mention are baked into the OS version they are using, so you won't be able to uninstall it without (possibly) rooting or even installing a community version such as CyanogenMod.