Florescent tubes - Unusual problem..

Ask for money for the heavy metal contamination deep clean, now required too.

You think Asbestos removal is expensive, you aint seen anything when it comes to vapourous heavy metals!!

From the wiki article, but kinda pertinent:

Fluorescent lamps contain mercury released when bulbs are broken. Mercury in bulbs is typically present as either elemental mercury liquid, vapor, or both, since the liquid evaporates at ambient temperature.[75]

When broken indoors, bulbs may emit sufficient mercury vapor to present health concerns, and the U.S. Environmental Protection Agency recommends evacuating and airing out a room for at least 15 minutes after breaking a fluorescent light bulb.[76]

Breakage of multiple bulbs presents a greater concern. A 1987 report described a 23-month-old toddler who suffered anorexia, weight loss, irritability, profuse sweating, and peeling and redness of fingers and toes. This case of acrodynia was traced to exposure of mercury from a carton of 8-foot fluorescent light bulbs that had broken in a potting shed adjacent to the main nursery. The glass was cleaned up and discarded, but the child often used the area for play

The HSE:

0.025mg per m3 over 8 hours is max permitted dose, i.e. 0.000025 grams of elemental mercury vapour per cubic meter of air, for up to 8 hours is considered permissible. Any more, or any longer, and you hit the threshold of safety.

Now, one 4-6' tube contains 3 to 15 mg of elemental mercury (Older units perhaps as much as 40mg). Lets say 10mg is typical, and thanks to your wrestlers, pretty much all 10mg has just been violently shaken into the air. So 10mg into say the ring air volume, say 5mx5m x3m high? So 10mg into 75m3 = 0.0013mg per m3 per tube (assumes even coverage of the air in the ring, it will be at much greater concentrations directly around these idiot wrestlers, and for the air nearest the broken shards on the floor). If they broke 20 tubes, they would breach 0.025mg/m3 limit, even with the flaws in my model. In reality the immediate area around the broken glass, would breach 0.025mg/m3, and concentrations would tail off towards the audience.

If the tubes were older types with higher levels of mercury, say 15mg+, only a 6-12 smashed up would hit threshold limits.

That is ignoring the phosphates in the white powder of the fluorescent coating. Halo-phospors shouldn't be too nasty (appatite, a fluorinated phosphor compound is the main constituent of bone), but many other phoshor compounds are bloody horrible, just ask sheep farmers from the 80/90s. Organo Phosphates in sheep dip are linked to shed loads of long term illnesses.

For my sins, I do have a Desmond in Chemistry, so have filled out the odd COSHH form. Even the post grad students avoided using mercury in experiments, as, even with fume cupboards and good experimental practice, it is nasty stuff, and generally alternative reagents were sort.

You may be able to actually get a criminal conviction against these idiots for ABH. Fookwits of the highest order. I would be tempted to shop them to the HSE, and let them sort it out.