Andrixo :
I am looking to spend £1000 on a camera, I want to use it for video recording but mainly for photos, landscape photos and a lot of macro photography. The problem is that I am unsure of whether to get crop or full frame, is full frame worth it? I am generally looking and Nikon and Canon cameras. Detail and picture quality is probably the most important aspect.
Given your budget you are going to have to choose one thing to focus on at the beginning.
The Macro lens will be slightly cheaper on a Nikon if you are willing to get an older lens. There are plenty of older 50 and 55mm macro lenses which can be had for cheap. On the lower end bodies these will be manual focus, but macro is almost always manual focus so that is normal.
For a wide angle the best low cost one is the Sigma 10-20 f/4.5-5.6. It is available on both Nikon and Canon.
Full-frame is worth it, but that is sort of like asking is a BMW worth it. Of course it is, but it's still very expensive.
The cheapest full-frame camera is typically the Nikon d600. It had an issue with oil spots when it first came out. This was fixed on all of them for free but the model was tarnished so Nikon quickly came out with the very similar d610. Leaving the d600 unwanted despite being nearly identical. I am not suggesting full-frame given your budget, but if you do decide to look at it, begin by looking at the cheap one.
Detail and such on both of them is good. In general Canon has lagged behind in the sensors technology, and this is more obvious on the aps-c cameras. Don't rush to judgement. Look at the raw capabilities on Dxomark.com and then look at the reviews and sample images on dpreview.com Both of those are the defacto standard bearers in digital photography.
For Macro you must also budget a tripod, ideally a flexible one which can be used at all sorts of angles.
Here is an older photo from a few years ago.
https
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In it you can see the lowest cost macro tripod I have found. It is a Benro and I got it from B&H in NY. I recall it costing less than $150. It is comparable in build to my much costlier Manfrotto.
Be careful of internet advice on expensive purchases. They are worth exactly what you paid for them. Most have only used 1 brand and can't conceive of why anyone would want to use anything different. A great many want you to validate their purchase by buying the same.