I spoke to them this morning about an order of 123 and they said £3.75, but I was surprised to see it was £6 when I ordered online (although, in fact, it was nothing as there is an offer of free p and p this week for online orders from the catalogue). Certainly, in the past it's been £3.75 and this is also quoted in the DS catalogue for post, fax and telephone orders, but you are referred to the website for online delivery charges. The threshold for free delivery on parts was in the £30 region but may have gone up recently to £50. However, I am about to send an order in and so if you want you can add your four parts to it I will then post them on to you (I'm pretty certain my order will be foc.)