We have no plans at present to do so. This issue is being addressed by the United Nations Economic Commission for Europe (UNECE) and the European Commission have recently published a proposed regulation on vehicle noise, and that proposal includes a requirement that, if manufacturers choose to add noise to electric or hybrid vehicles, then the noise added should meet certain harmonised standards. This proposal is currently the subject of discussion and negotiation at a European level. A final text is likely to be published during 2013.