Career
Tancock is a product of the Swansea City academy. In September 2014 he joined Football League Two side Newport County on a one-month loan deal. Tancock made his football league debut for Newport against AFC Wimbledon on 27 September 2014.
On 23 October 2014, Tancock extended his loan for a further month.
On his return from Newport County, Tancock immediately joined Conference Premier team Wrexham on a one-month loan deal. On 28 May 2015 Swansea City confirmed that Tancock had been released by the club
Tancock has represented Wales under-21 on six occasions.