How much does it cost to call one of those numbers from a BT phone?

What about other numbers beginning 08 or 09?
How much do those "unlimited weekend" tarriffs cost on a weekday?

BT ‘Unlimited Weekend’ package means 0870 and 0845 free, other packages you may pay for these call at certain times
09 are premium rate numbers and providers can charge whatever they want

Go to BT.com for info

i bought a ex bt ford transit but theres some patches that need respraying but i cant find the paint code anywhere . the plates on the van dont contain the right paint code as it was sprayed by bt . any help would be great

A good body shop will have a gadget which reads your current paint colour, which is bound to have faded a little, and concoct the right colour to suit.

because my nan wants to know.

openworld is the name BT used to use for internet access. It was before broadband was widely available so openworld was a dial-up service.

It was then changed to BTYahoo and offered yahoo services too. The old email addresses were @btopenworld.com now its @btinternet.com.

BT still does dial-up access but the main focus for all isps now is broadband