Original sentence: Engel is in amongst a small group of MPs (sixty) who have taken advantage of a little known category allowing MPs to wire taxpayers money directly to bank accounts as 'petty cash' and without the need to supply receipts as to how the money has been put to work on behalf of constituents
Edited sentence: Engel is in amongst a small group of MPs (sixty) who have taken advantage of a little known category allowing MPs to wire taxpayers' money directly to bank accounts as 'petty cash' and without the need to supply receipts as to how the money has been put to work on behalf of constituents