Section 97 of the 1990 Act provides the local planning authority with the power to revoke a planning permission when it considers it expedient to do so. If a local planning authority found that there had been a material inaccuracy or an attempt to mislead in the planning application and it considered it expedient to do so, it could revoke on that account. It already has the powers to revoke the planning permission. There is, however, the attached issue of compensation.