The simple task of ordering the lintels proved extremely frustrating! I took advantage of IG Lintels free design service and, after negotiating a very substantial discount on the list prices, decided to go with them. We (actually my architect) was not convinced by their plan so he suggested we ask the local rep to call in and double check. Some changes were made and I then placed the order. De-coding the plan was not straightforward and I did not begin to spot the errors until they arrived and I began laying them out around the house. It then transpired that they had specified some for the Dormer windows and some for a 100mm wall cavity. They had also specified some "specials" (i.e. non-stock and therefore expensive) where we could have used standard items. Lesson? Lintels may be boring but you need to check the "experts" spec very carefully. Yogi (our cynical bricklayer!) said they would cock it up - he was on the money as usual.