the m23 is a motorway in the united kingdom, running from the south of hooley in surrey, where it splits from the a23, to pease pottage, south of crawley in west sussex where it rejoins the a23. the northern end of the motorway starts at junction 7 on what is effectively a spur north from junction 7 of the m25 motorway (junction 8 on the m23). from hooley it runs for past redhill, gatwick airport and crawley. a spur runs from junction 9 to gatwick airport.