“When buying a fund, even one as apparently cheap and simple as an index-tracker, investors need to be aware of the total 'on the road’ cost of buying and owning it,” said Fidelity’s statement. “The headline annual management charge is just one element of this total cost.” In several examples, “headline” charges advertised were only available to those investing six-figure sums. Last year The Daily Telegraph disclosed that Britain’s 8 million savers lost an average of £800 a year to hidden levies.