Lone worker monitoring solution I agree with Brian - Verisafe is a great system and a not for profit organisation built on providing a call for help for domestic violence sufferers. Contact Hannah Millward for a run through:
hannahatverisafedotco
We're about to trial a small device called a "flic"
https://flic.io/ for receptions and alike - you can programme it to do a multitude of things and use other software to send messages, emails, or sound alerts in other systems. Doesn't have the installation costs of monitored systems or the monthly bill.