Meanwhile, up the M6, a very noisy fire engine has just driven past the Academy Stadium in Manchester.

No chances to report.

Birmingham have begun this second half brightly and Rebecca Holloway's marauding run down the left wing is ended by a blatant body-check from Arsenal's England defender Leah Williamson.

A straightforward yellow card for the official, that one.

Birmingham have only scored 10 goals in 12 Women's Super League games all season - they will need two in the second half to have any chance of getting anything out of this one.

With that in mind, striker Claudia Walker has been brought on at half-time, along with Christie Murray. Chloe McCarron and Emily Murphy are the players to come off.

Chelsea have conceded just eight goals in the WSL this season.

This could be a very long afternoon for the Hammers.

As expected, Man City continue to pressure the visitors at the start of the second half.

City are playing some beautiful football but can't quite find that final pass. Solid defence from Everton so far.

We are back under way in our three 14:00 GMT kick-offs.

Well, two of them - there's a slight delay in the Midlands for the second half of Birmingham v Arsenal.

But the goalless games between Manchester City and Everton, and Brighton and Tottenham have resumed.

But it's West Ham with a lightning start.

Martha Thomas latches onto a forward ball and curls an effort narrowly over. Warning signs for Chelsea.

West Ham have the worst home record in the WSL while Chelsea are unbeaten away from home this season.

It's going to be an uphill battle for the Hammers today folks.

Here we go then. Game four of four gets under way.

After a little delay, league leaders Chelsea kick off in a crucial London derby at both ends of the table.

Half-time in our three 14:00 GMT kick-offs, then.

It gives us a quick chance to remind you what happened earlier today...

A bit of half-time reading for you - check out Emma Sanders' fascinating feature on two British players enjoying life with AC Milan.

Image source, Getty Images

West Ham hand a first start to Iceland international Dagny Brynjarsdottir, who joined on a one-and-a-half-year deal in January.

Zecira Musovic makes her first Chelsea start in goal, coming in for Ann-Katrin Berger despite the German's double penalty save against Atletico Madrid in the Champions League on Wednesday.

There are just five players on the West Ham bench - compared to Chelsea's nine.

West Ham XI: Brosnan, Redisch, Flaherty, Fisk, Vetterlein, Longhurst, Brynjarsdottir, Svitkova, Van Egmond, Dali, Thomas.

Subs: Ramsey, Pacheco, Cissoko, Barker, Nor.

Chelsea XI: Musovic, Bright, Ingle, England, Ji, Reiten, Mjelde, Kerr, Charles, Harder, Andersson.

Subs: Berger, Orman, Blundell, Carter, Leupolz, Kirby, Fleming, Spence, Fox.

Two goals in the space of three minutes look to have put this one beyond the hosts.

Caitlin Foord got them both, first with a header and then a tap in.

That's nine league goals for the season for the Australia international now.

It's goalless at the break. City have had the better of the chances, most notably through Sam Mewis, but the visitors have stuck to their task well.

Goalless at the break but it was Spurs who nearly took the lead just before the half-time whistle.

Shelina Zadorsky's header was well saved by home goalkeeper Emma Koivisto.

Everton suffer their second injury of the day as Ingrid Moe Wold is forced off and Hayley Raso is on in her place.

The hosts are taking charge of this now and it's Sam Mewis who takes on the shot from the edge of the area.

It's off target but Everton are struggling to get up the pitch at the moment.