>Does this mean that if you switch supplier there is an up front cost for a meter replacement ?
No, if you have a meter and switch suppliers, the old meter normally continues to be used
As to who should pay in this case, you could argue the costs of installing/replacing metters is part of the standing charge though. But I think if you buy a house with no electricity supply meter you would be expected to pay. If I bought some land and built a house on it I'd expect to have to pay to gei it connected to mains supply and have a meter fitted