My guess
 

I have no information only guesses.

Based on my amateur interpretation of body language of a photo which can sometimes capture odd unrepresentative moments.

They seem to know each other well enough to be comfortable naked and close together. But I doubt they are work colleagues - I've never worked in such a friendly place! Perhaps they are from the same naturist club day out.

Assuming:
1. these are spouses (wedding rings on all 3 women and at least 1 man).

2. women are generally more modest and careful of avoiding sexual misunderstanding than men (assuming this event attracts naturists rather than swingers). Therefore I have given more weight to the women's body language than men.

Numbering the people from left to right 1(m), 2(f), 3(m), 4(f), 5(m), 6(f).

I guess:
2(f) holding 1(m) = couple
4(f) "spooning" 5(m) = couple and 4(f) keeping a slight distance from 3(m)

3(m) is being "familiar" with 2(f)
6(f) close to but not fully touching 5(m), 6(f) apparent breast position is due to her posing movement.
3(m) & 6(f) may be a couple (assuming 3 couples).

Supporting/refuting evidence would come an examination of other photos to see if any of these people were running together or showed other "tie-signs" like holding hands.

This reminds me of Eng Litt creative writing exercises at school - seeing a picture and having to make up a story. Maybe if there were pictures like this in Eng Litt, then literacy standards would improve!

4 and 5 are definitely a couple. Not only spooning, but his right hand is in close proximity to her boob. My take is that 2 and 3 are a couple, and 1 and 6 are either the third couple, or singles with the group of 4. 1 is covering his nuts, and 2 has her hands placed politely on his hip. That says to me, they're not a couple.

Thanks for the input
 

I'm not sure you're right. I haven't seen any more pics of these people running which leads me to think maybe they are ZSL work colleagues who helped arrange the day.

Just wanted to see if there was an update on this? I dont know about anyone else but Id love to see any photos you have!!

aardwhite, are you still planning on posting these pictures?

Thanks

Fango

I am. I mostly surf the site on my phone, but I promise to do so next time I get the opportunity when I'm on my laptop

Sad news, it does not appear there will be any streaking in London Zoo this year.

I could be wrong but they have a schedule of events up to September including "Skydive for Lions" "Firewalk for Lions" and "London Zoo Stampede" (a 10K run going through the zoo), and they say they are focusing their fundraising this year on their Lions400 campaign.

There's no mention of any streaking for tigers.

I can't say I'm surprised. The turnout was much, much poorer last year than the year before, and these things are subject to the law of diminishing returns. End of a good thing though.

Reminds me one day I was walking down Oxford Street when a car full of Indians pulled up beside me and asked,
"Pliz, vere iz zee London jooo."
I sent them off to Golders Green synagogue before I finally twigged what he was trying to say.

All the same, I'm surprised that pairing a naked run with a noble cause would have such a weak shelf life. There have been fully clothed runs for less pressing charities that have been going on for decades.