One of the most enjoyable parts of my boot sale treasure after buying it, is researching it on google. Sometimes its really straightforward to find dates, manufacturer etc and sometimes it takes a bit of digging. The seller told me that this was a Hecworth Tea and coffee set from Australia. Which I must admit I thought didn't seem likely, it looks so classically English ! He was right. There was no Hecworth on the UK sites anywhere and all the google ebay links lead to Australian Ebay. There was a similar set selling on Australian Ebay but it was in appalling condition. Mine as you can see is totally mint, a few small scratches on one of the pots but apart from that it doesn't even look as if it has ever been used.
I did a bit more digging and then came up with a webpage from a museum in Australia with this picture and information !