Total cost of Nudura blocks is £14,900
C35 concrete is £675
C25 concrete is £2800
Plus pump truck £850
Call it £20,000. Add £9000 for the brick slips as described so that it allows for damage / waste. Then plasterboard the inside walls £700. That's finished wall construction inside and out which includes 102mm eps insulation inside and out with a u value of .016, no vapour barrier needed and it's £30,000.