Table:
text: Digital radio in the United Kingdom
Local ensembles
Local ensembles
Area Advertisement_date Block Winning_applicant Ensemble_name
Hertfordshire , Bedfordshire and Buckinghamshire December 2006 10D NOW Digital NOW Home Counties
Derbyshire January 2007 10B NOW Digital (East Midlands) NOW Derbyshire
Wrexham and Chester February 2007 10D MuxCo MuxCo North East Wales & West Cheshire
Hereford and Worcestershire March 2007 10B MuxCo MuxCo Hereford & Worcester
Northamptonshire April 2007 10C NOW Digital NOW Northampton
Oxfordshire May 2007 10B NOW Digital NOW Oxford
Gloucestershire July 2007 10C MuxCo MuxCo Gloucestershire
North Yorkshire June 2007 12D MuxCo MuxCo North Yorkshire
Mid and West Wales August 2007 12D MuxCo MuxCo Mid and West Wales

text: Digital radio in the United Kingdom
Local ensembles
Local ensembles
Area Advertisement_date Block Winning_applicant Ensemble_name
Surrey and Northern Sussex September 2007 10C MuxCo MuxCo Surrey and Northern Sussex
Lincolnshire October 2007 10D MuxCo MuxCo Lincolnshire

Question: What is the announcement date of the ensemble name Muxco Gloucestershire in block 10C among digital radio in the UK local ensembles?