door step callers/cold calls, are they illegal? they certainly shoudl be..

[SlartyBartFast]

we used to get them a lot on a previous estate but since we moved to a high street address we don't seem to have any.

until today! aargh, and in my defense i was tired, and not dressed yet he was saying as we had an edf energy meter but did not have electricity from edf, they would not be able to upgrade it, is this cold calling by stealth?
then he starts going on saying i shoudl have economy 7.
Why I demanded, why do you want to know!
i still couldnt understand why he had to disturb me!

so are they illegal?

and quite often they are rude first

i had one older man who wanted to come in with his lap top as it was raining, for some reason or other, i said i am cooking, he asked if DH could cook!! how veyr dare he.