A good one is designed for the audience and their needs, so probably by you I'm afraid.

Morning Chris

I agree with Kate and AK.

If you look not too hard I think you should be able to find a LOLER presentation on Google, just like you can find most things on Google. Whether it would be particularly useful is an entirely different question.

For at least the last 17 years, every time a new code of health and safety regulations has come out in Great Britain there have been instant experts wanting to sell training courses in this, that or the other "major" change and at some point their presentations may be made freely available on the internet or someone cobbles together something similar.

It is very easy to go through any code of regulations and turn them into slides. 

What's not so easy is to distill which bits of the regulations really matter to the audience.

What is then even more difficult is guessing the questions the audience will ask you and being prepared to answer those QQ.

But those QQ are almost all going to be the ones that are relevant to what the audience do, i.e. your work activities (if you are employed by the same organisation) - this means that it is even more critical that your presentation is tailored to what is relevant. 

.....and even the most experienced will usually learn something by putting together their own presentation, and sometimes even more, if putting together something for someone else to present.

Enjoy!