Preview: the midweek action in Step 4 Bostik

By Andrew Frecklington
Fourth-placed South Park can go top of Bostik South with victory at Corinthian Casuals tonight, with none of the league's top three – Whyteleafe, Lewes and Sittingbourne – in action.
The Sparks battled back to snatch a point at the weekend after it seemed Hythe Town would inflict only their second defeat of the season on them, leading 2-0 with 20 minutes to go.
They will be looking for their third consecutive away win, but will face a Casuals side with aspirations to move into the play-off places with victory of their own.
Meanwhile, fifth-place Walton Casuals travel to Greenwich Borough looking to maintain their push towards the top, while Carshalton Athletic – one of only two sides to still be unbeaten along with second-placed Lewes – face an away date at Chipstead.
Herne Bay play Ashford, Hythe welcome Faversham and Phoenix Sports warm up for their FA Cup date against Enfield with a home clash with Thamesmead.
Meanwhile, in Bostik North, the big clash of the night comes from Tilbury, as the Dockers take on third-placed Bowers & Pitsea.
The visitors will be in buoyant mood after seeing off Potters Bar 4-2 on Saturday, scoring four second-half goals and coming from behind twice to steal the win.
Fifth-place Bury Town play seventh-placed Dereham Town. The Blues were also late winners at the weekend with Cemal Ramadan netting their winner in a 2-1 victory at Cheshunt, while Dereham can move into the top six despite dropping two points against Barking, conceding a 90^th minute equaliser.
Elsewhere, Barking play Aveley, Brentwood take on Maldon & Tiptree and Soham Rangers tackle AFC Sudbury.