That's your lot from me.
- Two changes for West Ham as Ogbonna and Nordtveit start
- WBA make two changes as Rondón and McClean start
- Hal Robson-Kanu on bench for Baggies
Huge win for West Brom.
That first hour killed West Ham. Despite two goals in four minutes, they were always going to struggle to get anything out of the game.
A fourth league defeat for West Ham and a first home win for West Brom since March.
That could have been the dream start for Hal Robson-Kanu.
Matt Phillips puts in a delightful cross but the Welshman is inches away from poking it into an empty net.
Salomon Rondon is replaced by Hal-Robson Kanu. who makes his West Brom debut.
West Brom are not sitting back here.
James McClean has a pop but it is saved by Adrian.
Michail Antonio cross is met by James Collins but Ben Foster makes a crucial save.
That would have made things very interesting.
Arthur Masuaku is off with Ashley Fletcher on.
A rare corner for West Brom in this half and some respite from the West Ham bombardment.
West Ham have had 10 shots in this second-half so far with Dimitri Payet the latest to let one fly.
Three of their shots have been on target, they only had one on target in the first-half.
Nacer Chadli is off injured, replaced by James Morrison.
Dimitri Payet has a crack from distance and wins a corner.
This could be an exciting finish.
Any predictions how this one will end?
West Brom looked home and dry when it was 4-0 - 10 minutes later and their lead has been halved.
Brendan Galloway is off and Nyom is on to make his debut.
The Argentine slots in the bottom left corner.
Just under half an hour left.
Dimitri Payet is fouled by Brendan Galloway and Mark Clattenburg points to the spot.
Will this be any more than just a consolation goal?
Dimitri Payet's cross from the left is met by Michail Antonio who heads in his fifth Premier League of the season.
He can't stop scoring with his head at the moment.
Dimitri Payet has a free-kick and it smashes the top left corner of the woodwork.
It all came from a West Ham corner. They tried to take it quickly but West Brom broke.
Salomon Rondon led the counter-attack, sprinting forward clear of the West Ham defence, who were sitting very high.
With just the keeper to beat and the Hammers defence in pursuit, Rondon unselfishly squared to Nacer Chadli who poked home for his second.
Michail Antonio cuts in on the right and drives into the box and tries his luck but his shot is saved by Ben Foster.
West Brom are under pressure here.
West Ham are showing more attacking intent in this half.
Suspect Slaven Bilic did not mince his words at half-time.
Ben Foster tries to punch away a tricky cross, and he clatters into Jonathan Calleri but the free-kick is given against the Hammers player.
Bilic is not amused.
Andrew in Southend: 6 years ago we were 3-0 down against West Brom and drew 3-3... who's to say it won't happen again?
Jon: Last time we were 3-0 up at home to West Ham at HT, Demba Ba scored twice on debut and it ended 3-3... I'm not confident of the 3 points just yet!
You're right Jon.
Back in February 2011 the Baggies led 3-0 at half-time thanks to goals Graham Dorrans, Jerome Thomas and a Winston Reid own goal but a Demba Ba double, and Carlton Cole header, saw West Ham complete the comeback.
There's always hope West Ham fans.
Double substitution for West Ham.
Sofiane Feghouli and Jonathan Calleri on for Simone Zaza and captain Mark Noble.
BBC Midlands football reporter
It is like London buses here at the Hawthorns.
Former West Brom striker on Final Score
If you are a West Brom fan then go and put your lottery tickets on. It's unbelievable you have West Brom scoring so many in one game.
Great home debut by Nacer Chadi. One goal and two assists from the record signing.
Even they are confused...
I kid you not, this is the possession stats for the match.
West Ham have had all the possession and 10 shots, but only one has been on target and they are dreadful at the back.
I don't want to pick on any players but Arthur Masuaku has had a mare at left-back.
West Brom deserve their three goal lead.
First Masuaku gave away a penalty with a handball which Nacer Chadli gratefully scored.
Then Salomon Rondon punished some awful defending to double the lead before James McClean made it three, turning in Nacer Chadli's shot.
Kartik Venkat: What a decline for @WestHamUtd. European contenders one season, relegation candidates the next?
Ian Shepherd: Has Bilic put a load of cash on himself being the 1st 1 sacked?....because West ham r making it easy atm 4 him 2 be sacked...
Diego the Alter Ego: Imagine money is going to be lumped on Bilic to be the next manager to lose his job. Strange goings on at West Ham
Dreamland for the Baggies, an absolute shocker for the Hammers.
Matt Phillips is back on the ball, he is tormenting left-back Arthur Masuaku.
West Ham fail to deal with a corner, it drops to Nacer Chadli and his shot is diverted past Adrian by James McClean.
This is a half to forget for West Ham.
I'm hearing this is the first time West Brom have scored more than one goal for almost six months.
Former West Brom striker on Final Score
West Brom have hardly kicked the ball - and they're 2-0 up. It's an excellent finish.
Proof that statistics can mean very little in football.
With 24% possession in the first 37 minutes, West Brom find themselves 2-0 up.
Nacer Chadil plays in Salomon Rondon who swivels and fires in a rocket of shot past Adrian.
Good goal but the West Ham defence is not covering themselves in glory.
West Ham are attacking more now and they have their first shot on target.
Dimitri Payet chips into the path of Michail Antonio who has just Ben Foster to beat but he shoots straight at the keeper.
Better from the Hammers.
Dimitri Payet takes a quick free-kick and floats a cross in the box, it comes out to the edge of the area and Manuel Lanzini lets one fly but it is just wide.
All the West Ham attack of any note has been on the right and they have won three corners on that side.
Just seen Arthur Masuaku's hand ball again to give away the earlier penalty.
He actually runs with his hand up by his head. Bizarre.
Another West Ham corner. Dimitri Payet takes it and Michail Antonio gets his head on it but does not trouble the goal.
Free-kick to West Brom as Cheikhou Kouyate stops Matt Phillips.
He and James McClean are impressing for West Brom.
Jonny Evans floats one in, and James Collins out muscles Salomon Rondon. The ball comes back into the box, Adrian fumbles but gathers at the second attempt.