electronics from the US to the UK

so fine, i don't need to take my hairdryer or anything, but what about:

my macbook (got it a year ago)
my digital camera charger (panasonic lumix take out the batt and charge it on the wall)
ipod charger

We had no problems with Macs or iPod chargers, I'm pretty sure our battery chargers for cameras were just fine too - all just needed adaptors.

Look at the label/markings on the chargers.  If they say something like "100 to 250 volts" then they'll work here with just a physical plug adapter.  If they're marked just "120V" or "100 - 120V" or similar, they won't.

Most of our electronics (a desktop PC, two monitors, printer, digital camera charger, and 2 laptops) worked with just a physical adapter (we wound up buying actual replacement cords which run from the power supply to the wall).  One of our electronics (base for a cordless phone) worked with buying an inexpensive AC-DC transformer (the big black box thing some devices have) here instead of buying a (more expensive) US-to-UK converter.  We needed to buy one of those for our rechargeable toothbrush base (since it only worked on 110-120 V and was hard-wired in), but we got a cheap one since the thing only uses 3 W.

worked with just a physical adapter (we wound up buying actual replacement cords which run from the power supply to the wall). 

That's the better option where the cords are detachable, since a large proportion of the plug adapters are cheap made-in-China junk of extremely dubious quality (some have some quite serious safety issues).   Replacement cords with a U.K. plug will generally work out cheaper than adapters anyway, so long as you are buying them at the right places.