It would appear that there may be several possible intellectual property rights involved here. Let's start with what seems unlikely to apply here.
. You mention 'ideas [...] and conclusions reached". Unfortunately copyright provides no protection for ideas alone. It only provides protection for your specific expression of the underlying idea, and in theory it would allow others to create their own expression of the same idea. If the underlying concepts/developments you want to talk about are either literary or artistic in their form, say something like a sample of the text of a new operating manual or a written script for dealing with customer complaints or an advertising slogan/campaign then it is possible that your presentation materials could be subject to copyright. However section 11(2)
of the Copyright Designs and Patents Act 1988 specifies that the owner of any such copyright would be your employer, unless there was a clause in your contract of employment which varied this. But even assuming that you retained the copyright in the expression of your ideas, marking the slides in your presentation with a copyright notice would offer very little protection to those underlying ideas.
. Similarly if you were suggesting a new design of a product for the company, this might be covered by something called unregistered design right
, and again it is most likely that your employer would own that design right for anything created by you in the course of your employment (see section 215(2)
CDPA 1988). However from the way you have described things, it doesn't sound as if there is an actual new physical product involved here.
. The next area of IP for this might be that of trade secrets. There is very little statute law covering trade secrets. The main protection comes from the Trade Secrets (Enforcement) Regulations 2018
, but as you will see if you can be bothered to wade through the Regulations, this provides little or no protection to ideas or concepts which are lawfully imparted to someone else, as would be the case with your presentation. It is more about protecting those ideas or processes, provided that they have the necessary qualities of trade secrets, from a third party such as a rival company.
. Just for the sake of completeness we can exclude patents as a patent
cannot be used to protect a business process, and in any case you would have needed to have started the patent application process in order to gain any protection.
. So that just leaves a rather more nebulous area of IP covering the pitching of ideas. There is no statute covering this in relation to business practice (unlike say, medical information or personal data). It involves a common law doctrine of confidentiality. The courts have described confidentiality* (in the realm of business) in the following way:
Two elements are normally required if, apart from contract, a state of confidence is said to exist. First, the information itself has the necessary quality of confidence about it. Secondly, that information must have been imparted in circumstances which gives rise to an obligation of confidence.
The tort (civil wrong) of breach of confidence comes about when there is an unauthorised use of that information to the detriment of the person communicating it.
Bear in mind that to meet the first criterion, the ideas you want to protect must not fall into any of these categories: i) The information is generally already accessible (eg in use in another company or sector), ii) It is too trivial or obvious, (ie anyone seeing the end result could easily work how it was achieved) and iii) The public interest in confidentiality is not outweighed by some other countervailing public interest
. In order to meet the second criterion, you need some sort of affirmative method of ensuring that your audience realises that what they are about to see and hear obliges them to respect the confidential nature of the information. This is usually done by first asking all participants to sign a Non Disclosure Agreement (NDA)
. You can find examples of NDAs online, but you may need to alter them to suit your circumstances. The key part which must be included is that the company, as represented by any attendees at the meeting, may not use the information without your agreement and may not discuss it without you being present. Obviously the company representative(s) may decline to agree to sign the NDAs. Only you can tell whether such a thing would be acceptable to them. For example if you are employed in role which requires you to come up with new ideas, or to increase the efficiency of the company, it may be that you expected to produce these ideas for the benefit of the company without any strings attached.
I hope this helps you.
* The landmark case from which this description is taken was Coco v A.N.Clark (Engineers) Ltd  RPC 41