I had a long answer typed out, but basically: DON'T DO IT!
Change all 4
The difference between 195 and 205 affects the width, but the circumference, but it's still a really bad idea to only change 2.
Tyre suppliers may tell you different. Don't believe them.
Another clueless tyremonger trying to kill your IRD . Get a set of four good tyres that will last you and don't look back. Also make sure you get them rotated every few k to make sure they wear evenly.
thank you he tried to tell me that they were just wider so it would be OK, silly manFfs! The first no is the width in mm, the second is the profile of the sidewall, the third is the rim diameter. The profile isn't a fixed value it's a percentage of the width, so the sidewall on a 195/80/15 is 80% of 195mm on a 205/80/15 it's 80% of 205mm, any retarded tyre monkey should know that and you don't do it on a 4x4 particularly one like the freelander! You end up with the wheels spinning at different speeds which not only winds up the transmission but can also trigger abs or traction control or put faults in the systems! I'd go elsewhere cos they don't deserve your money!!!
These are the differences, sorry for the alignment of he text -
195/80/15.................205/80/15
Diameter 693mm 709mm
Circumference 2177.1mm 2227.4mm
Poke 42.6mm 100.7mm
Inset 122.6mm 140.7mm
Speedo error 0% -2.26%
Reading at 30mph 30mph 29.32mph
Reading at 60mph 60mph 58.65mph
Ride height gain 0mm 8mm
Arch gap loss 0mm 8mm