Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Round | Circuit | Date | Pole Position | Fastest Lap | Winning driver | Winning team |
| --- | --- | --- | --- | --- | --- | --- |
| 1 | Donington Park | 6 April | Jamie Green | Alan van der Merwe | Jamie Green | Carlin Motorsport |
| 2 | Donington Park | 6 April | Jamie Green | Jamie Green | Jamie Green | Carlin Motorsport |
| 3 | Snetterton | 20 April | Alan van der Merwe | Richard Antinucci | Alan van der Merwe | Carlin Motorsport |
| 4 | Snetterton | 20 April | Alan van der Merwe | Richard Antinucci | Alan van der Merwe | Carlin Motorsport |
| 5 | Croft | 4 May | Will Davison | Will Davison | Will Davison | Alan Docking Racing |
| 6 | Croft | 4 May | Alan van der Merwe | Alan van der Merwe | Alan van der Merwe | Carlin Motorsport |
| 7 | Knockhill | 11 May | Clivio Piccione | Clivio Piccione | Clivio Piccione | Manor Motorsport |
| 8 | Knockhill | 11 May | Nelson Ângelo Piquet | Nelson Ângelo Piquet | Nelson Ângelo Piquet | Piquet Sports |
| 9 | Silverstone | 25 May | Nelson Ângelo Piquet | Nelson Ângelo Piquet | Nelson Ângelo Piquet | Piquet Sports |
| 10 | Silverstone | 26 May | Nelson Ângelo Piquet | Alan van der Merwe | Alan van der Merwe | Carlin Motorsport |
| 11 | Castle Combe | 22 June | Danny Watts | Adam Carroll | Alan van der Merwe | Carlin Motorsport |
| 12 | Castle Combe | 22 June | Danny Watts | Danny Watts | Danny Watts | Hitech Racing |
| 13 | Oulton Park | 13 July | Nelson Ângelo Piquet | Danny Watts | Alan van der Merwe | Carlin Motorsport |
| 14 | Oulton Park | 13 July | Nelson Ângelo Piquet | Alan van der Merwe | Alan van der Merwe | Carlin Motorsport |
| 15 | Rockingham | 3 August | Nelson Ângelo Piquet | Nelson Ângelo Piquet | Nelson Ângelo Piquet | Piquet Sports |
| 16 | Rockingham | 3 August | Jamie Green | Nelson Ângelo Piquet | Jamie Green | Carlin Motorsport |
| 17 | Thruxton | 17 August | Danny Watts | Robert Dahlgren | Robert Dahlgren | Fortec Motorsport |
| 18 | Thruxton | 17 August | Eric Salignon | Eric Salignon | Jamie Green | Carlin Motorsport |
| 19* | Spa-Francorchamps | 30 August | Alan van der Merwe | Jamie Green | Alan van der Merwe | Carlin Motorsport |
| 20 | Spa-Francorchamps | 31 August | Robert Doornbos | Jamie Green | Alan van der Merwe | Carlin Motorsport |
| 21 | Donington Park | 6 September | Alan van der Merwe | Nelson Ângelo Piquet | Nelson Ângelo Piquet | Piquet Sports |
| 22 | Donington Park | 7 September | Rob Austin | Jamie Green | Rob Austin | Menu Motorsport |
| 23 | Brands Hatch | 28 September | Nelson Ângelo Piquet | Robert Doornbos | Nelson Ângelo Piquet | Piquet Sports |
Question:
Name the winning driver for 20 april
Answer:
Alan van der Merwe, Alan van der Merwe