It is not possible to provide a reliable estimate of the total cost of the sitting of the House on Saturday 19 October at this stage. The costs incurred will relate to additional staff costs and claims that Members may submit in relation to their attendance on that date. Such claims can be submitted up to the end of November and once the figures are available an update will be provided. Other directly attributable costs will be disclosed if available. However, for some general running costs, for example heating and lighting etc., it will not be possible to attribute those to a specific date.