You want to call up and say:
XX Zone/Approach, G-XXXX
G-XX pass your details
G-XX currently 5nm W of field over Xham at 2000' on Barnsley request MATZ crossing West to East at 2000'
G-XX MATZ crossing approved at 2000' QFE 989 no closer than 2nm
2000' 989 G-XX