Car Tax Refund Cheque Expired

I sold my car last year that had 5 months tax remaining. Following the sale, I went away on holiday. My family placed the cheque (Over £100) where it slipped behind a drawer, When I came back from holiday, I totally forgot about the refund.

Today, I cleared out the drawer and found it. Its dated 23rd Aug 2017 and says its only valid for 6 months from that date.

Has anyone had a similar problem... If I call them will they re-issue the cheque?

Thanks in advance