Yes, because I used nationwide for my recent mortgage. They always include it in the overall cost for comparison.
The "overall cost for comparison" does take into account the fees but not the "total paid".
In your example figures, the overall cost for comparison including the fee is 3.6% and without the fee is 3.1%.
The total paid on the loan doesnt include the fee, so rather than him saving £300 by taking the product with fee, he'll actually be £700 worse off.
