These are excellent Paul! What pens are you using? i didn't realize there was such a good range of colours available.
Thanks Rob. I have several coloured ballpopint sets, Tesco do some as do Wilkinsons. I have brown and yellow in a set of 10 from Ryman stationery, which i got online but they were not available when i looked a few weeks ago. After looking around online for brown ink i ended up buying a Parker pen with a pack of brown refills off Amazon.