Disco 4 (LR4) Slight Transmission Oil Leak on MoT Advisory

I'm intending to upgrade to a Discovery 4 and I found what appears to an ideal car, 1 owner from new, full supplying dealer Land Rover service history and all MoTs were undertaken at the same LR dealer. However I note the following advisories on the last MoT:

slight play front lower arm bushes
slight play center propshaft bush
slight transmission oil leak

Is the slight transmission oil leak anything to be seriously concerned about or is it just a main dealer being a bit over the top on advisories? To give an example, I took my old Land Rover into the main dealer for servicing and they often advised work which wasn't ever mentioned on MoT advisories as I took it to a trusted independent for MoTs that I've been using for 30 years.

Is it relatively easy for me to check if the leak is severe when inspecting the car and am I right in thinking that a transmission oil change could potentially cure the leak? How much would a transmission oil change be and in the worst case scenario, what's the likely cost of resolving a serious transmission oil leak?

Many thanks in advance for your help.

All depends on where its leaking if at all from
The 6 speed auto box can and does leak from where the cable harness goes in and thats a sump off job to replace the seal as the retaining clip is inside the gearbox, many ohter makes of cars suffer the same.

You need to be aware there a few states of oil stain/damp/leak, some people panic when something is damp, others dont care even when its dripping on the floor.

If its damp and theres dirt stuck to the dampness, its not an oil leak and is just sweating = dont worry
If its damp and theres dirt stuck to the dampness with a fresh trail of oil running through the dirt = needs further investigation, but dont panic just yet
If its physically dripping on the floor or the underneath of the car is damp/spattered = requires attention asap

Front arms supply and fit 500/600 ish
Prop 200 quid, plus fitting

None of these faults are going to get better on their own and will need doing sooner or later and before you know it poof theres 1000/1200 quid gone!