#1 Worst modern energy hog - computer router.
- Many draw 30W continuously 24/7 literally roasting away
- If not needed overnight (10hrs say) it is 109 units or £12/yr

Getting it down to 1W gives a real world 29W saving.

#2 Worst missed energy opportunity - TV & Monitor.
- Going LCD from CRT did not save much for many people
- Moving to LED from LCD for TV & Monitor would do so.

Real possibility of a real world 29+29W saving.

#3 Some nasty LED clocks can run 9W.
- Easily replaced by LCD, some battery cost
- However with 3-4 clocks the saving does add up

Overall not difficult to get £100/yr saving or £1000 a decade towards
your heating system's depreciation.

Not worth changing a TV/Monitor - just when it fails (and they will)
the replacement can be LED (and most likely will looking 3yrs out).
Worth waiting that long anyway as backlight optics will take a while
to settle (easier with LED over CFL but still at early adopter stage).

We do not have enough uptake of heat pump technology (air to air) to
replace the millions of (radiant) gas fires out there. Most are only
50% efficient and a fair chunk of that efficiency vanishes up the
chimney dragging cold air through the house with it in voluminous
quantities. An A-A heat pump is cheaper than most fires, but not
likely to last a decade. Worse are the poor sods with "1-bar electric
fires". Warmfront for starters need sacking and a different system is
required based on consumer choice and a few inspectors rather than a
brown-overall "it creates jobs" civil servant in smoke filled room
gravy train.