How do I send a parcel by royal mail? -

I have all the price list of sending items, but I cant get to a post office... can I just stick the amount of stamps equivalent to the price for postage for the weight, on the packet, and just post it in a letter box?

You can use this online service. Parcelforce will come and collect it and deliver it for you.http://www.parcelforce.com/portal/pw

The best way is to go to your local post office, they will sort it for you.