I have posted this before. I do free quotes for consumer unit changes and if it takes me one hour, in that time i can find borrowed neutrals, poor IR, broken rings and a visual inspection. and a couple of ELFI's This approach installs confidence in the customer and also saves me the time when taking results for the actual cu change. any por results are negotiated. If i insisted on an EICR before hand, very few would be interested. I don't lose many quotes, my prices start from £350 for a 6 circuit installation. I add emegency non maintained lighting at the cu position where the house is protected by limited or one lighting circuit for £70.00.