Only Connect #42 Mystery Cache

I've enjoyed this series that was started by Jesmond Lynam and he has kindly allowed me to contribute further.

The final cache is not at the published co-ordinates but it is within a mile of them. You should be able to park almost right next to the cache location but it is overlooked and a certain amount of stealth and discretion may be required. You will need to take your own pen or pencil to sign the log.

To find the cache it is necessary to identify the five individuals in the pictures below and work out what it is that connects them. A couple of short calculations will then give the co-ordinates of the final cache.

G = the number of letters in the name of the person in photograph A. (two words)

H = the number of letters in the name of the person in photograph B. (two words)

I = the number of letters in the name of the person in photograph C. (two words)

J = the number of letters in the name of the person in photograph D. (two words)

K = the number of letters in the name of the person in photograph E. (two words)

L = the number of letters in something that connects the people above. (three words, plural)

Y = ((G - I) * L + J) * K - H

Z = (K * I) + L - H

The cache has been placed at: N55 02.Y W001 38.Z

You can validate your puzzle solution with certitude.