Pardew was the preferred candidate by a 'unanimous decision', according to chairman John Williams, despite having been out of football for almost a year following his sacking at Crystal Palace just before Christmas last year.
Pardew wasn't at the game but plenty of supporters braved the cold to give Megson what could be a rousing send-off and it was the largest Hawthorns crowd of the season.
Pardew spent £7 million on bringing Ashton to West Ham back in 2006 and the 34-year-old reveals to talkSPORT that his former manager's nickname is 'Chocolate' because "he would eat himself if he could".
"I've achieved that in the past at certain times at clubs and that's what I hope to do here".
Isaac Hayden returned to the squad in the 2-2 draw with West Brom on Tuesday night after missing the defeat to Watford through suspension.
Joven mapuche muerto de un balazo en un operativo del grupo Albatros
Los mismos fueron internados en el hospital Ramón Carrillo, de esa localidad, desde donde se constató la muerte de uno de ellos.
If Newcastle lose, it will be their 70th Premier League defeat in London - the joint-most of any away side in the competition (level with Everton).
"What happens in the Premier League now is you have the top six and the (rest) where anyone can beat anyone". But he showed at Palace that when inheriting a team capable of being well organised he can have success by giving them greater freedom.
West Brom's surrendering of a two-goal lead at home to Newcastle was an example of the team's fragile confidence. We did all right in the first half, and didn't feel too threatened.
Pep Guardiola's Manchester City are 11 points clear of the Blues, with Manchester United sitting in second as a weekend clash with newcastle United approaches. Tiemoue Bakayoko could also be recalled despite his poor display away at Anfield.
Although performances and results are a concern, the experienced manager is urging the loyal Newcastle fans to remain behind their side and avoid the temptation to turn on their players and make the playing atmosphere toxic.
Isaac Hayden returns from suspension tomorrow, and with Mo Diame set to drop out of the starting line-up, Benitez must decide whether to start with the former Arsenal trainee or the fit-again Mikel Merino.