Lawn brown spots help...

Always harder when you're rural/semi rural @AndyG99, and sometimes you have to go with the flow a bit more, and accept that things get in where you don't want them. Wait until the rabbits etc start!
Mind you - it can be just as annoying in residential areas, when people around you allow all sorts of weeds, or troublesome plants/shrubs, and don't bother keeping their gardens maintained, which then affects nearby residents' gardens. The selfishness can be astounding.
Not that I speak from experience of course....

Hope it does well for you next year. If you're in one of those very drought prone areas, keeping it a little longer helps too.

 

With an area that size, I think life would be much easier if you invested in some machinery.
Regular scarifying and aerating, plus, of course, regular mowing, top dressing, weed treatment, and feeding, and you will soon have much better-looking grass. It does take time, so be patient. Most of us have to leave watering to Mother Nature; you would need several sprinklers strategically placed, left on for hours at a time, to adequately water your whole area, so probably not worth doing. All lawns begin to look yellow at this time of the year. If there has been a shortage of rain, it is as tough as old boots and will recover.
I belong to a croquet club that has 3 lawns, which are never watered, so at the moment it is like playing on crispy brown vermicelli! The balls run so fast you only need to blow on them for them to shoot off into the far distance, as opposed to in the Spring when the grass is lush, growing strongly and full of moisture. Then the balls need to be hit hard, only to move a few feet.

 

I invested in a decent ride on mower straight away. Will look around and also get a scarifier and aerator, they will get used often enough to justify the outlay.

I've had some useful information from here so far.

Thank you all for your time to reply and hints and tips.

 

If you're in a drier area @AndyG99 [apologies if you've already given your location] and would therefore rely on self watering, that can be problematic.
Another solution is to concentrate on keeping an area nearest the house/patio looking greener, by whichever method suits best in terms of food and water. You can partially screen the rest of the area with shrubs or hedging or similar, leaving a gap, or several gaps, so that you can still have views through to the rest of the plot, and beyond, but the grass itself will be less of a problem for maintenance.
The part nearest the house can be arranged formally or informally, depending on your personal taste, and the screening can also be done that way. Autumn is bare root season, when hedging plants can be bought very inexpensively, but most of the companies who supply that also supply shrubs/trees, so you could have a mix of various types, depending on what you like and what will suit your location and climate etc. You'd get suggestions of places to look at but Hopes Grove Nursery is very reliable, and there's also Hedges Direct if you fancy having a go at that.