With the current Euro exchange rate we have looked at furniture packages etc in Spain and found using various interset free buy now pay in 12mth type deals it is cheaper to buy in UK and ship.
Electrics in the UK are fully compatible with the voltage in Spain but things like chargers, drills may not have the same power in Spain.
White goods you just buy a plug adaptor and they work as if in UK system.
Saying that we have decided to buy all electrics in Spain (mainly for guarantees)
We will be transporting beds, mattress, suite, dining table, linens, garden furniture etc.
My wife has done some number crunching and has worked out even paying shipping we will save £1000 + (maybe more) and have exactly what we want, and not pay anything for one year on just about everything we buy.
We have not turned our back on Spanish goods and will buy lots of add-ons accesories etc in Spain.