>You will give the Company full written details of all Inventions and of all works embodying Intellectual Property Rights made wholly or partially by You at any time during the course of Your Employment (whether or not during working hours or using Company premises or resources) which relate to, or are reasonably capable of being used in, the business of the Company or any Group Company. You acknowledge that all Intellectual Property Rights subsisting (or which may in the future subsist) in all such Inventions and works will automatically, on creation, vest in the Company absolutely. To the extent that they do not vest automatically, You hold them on trust for the Company. You agree to execute promptly all documents and to do all acts as may, in the opinion of the Company, be necessary to give effect to this clause 20.1.
Was this intended as an example of a desirable version or an undesirable version of such a clause? I thought the poster you're replying to asked for a suggestion for something you might actually want to put in your contract, but your example seems to give the company exclusive rights to everything (unless it's not "capable of being used" by the company, but surely they could find some use for any piece of software if they want to).
This part was missing from my old contracts.
As far as I understand it, this clause does not force you to even disclose projects you have that are completely unrelated to the company's business. Key word "business" here, not "company".
Example: your personal blog is not related to the fact that your employer develops and sells databases. So whatever code you write to develop/manage your blog won't be a "invention" the company needs to know about and own. This is in contrast to a contract that states "whether during our normal hours of business or otherwise, or at the premises or using our facilities or otherwise, for the whole term" like I used to have. Here the word business does not even refer to the company activity, but to the 9-6 schedule.
"which relate to, or are reasonably capable of being used in, the business of the Company or any Group Company" sounds like a good phrasing to me, especially the "business" part of it as I interpret it to be the company simply wanting you to not build a competing product while employed there (a fair thing to have in a contract).
For reference, this is what my last contract had: https://news.ycombinator.com/item?id=24220800 (notably 13.4 (c))
How I see it, "whether or not during working hours or using Company premises or resources" is not problematic here as "or otherwise" was in my block of text since this only refers to the employer's "business" related IP, and not "everything" you create (if your personal work is a stock trading library and your employer sells a booking for dog haircuts SAAS, these won't collide).
What matters is how a judge will interpret it, if it should become an issue.