Lawn care advice please

If you have bare patches, you may need to reseed those - the trouble is, you can't reseed once you've applied a lawn treatment such as Evergreen Weed, Feed and Mosskiller. As you've such a large area, its your choice whether you think applying a liquid lawn weedkiller with a can, and then applying a feed separately, is too time consuming (seems like it is to me) so one of the granular weed and feed treatments (such as the Evergreen one mentioned) might be best. You will need to wait 6 weeks after application before sowing seed though. Note that granular treatments come in two varieties - Weed and Feed, or Weed, Feed and Mosskiller. all need to be applied not less than 4 days after the lawn was cut, and on a fine day with little wind, when the blades of grass are dry. If it doesn't rain within 48 hours, you will need to water the lawn yourself to wash it in, but check the timings on the label. Not sure that's a problem in your area, don't know whether you're subject to a drought order currently.

I would echo what Bamboo said.

My only comment would be that many granular weed and feeds do not kill all weeds. Lesser trefoil is one that the weed and feeds I've used won't touch.

To kill the difficult weeds I water on or spot spray on the selective weed killer Verdone Extra which kills broadleaf weeds but not grass.

Brilliant, thanks very much. Verdone ordered!