I need to spend £100k in two weeks to reduce corp tax, what can I do?

Had a really good year this year and had way more profit than expected but now I'm going to have a huge corporation tax bill

I run a software company and overheads are low so I'm trying to find some clever ways to spend £100k to bring profits down. What can I invest in up front?

Some ideas I have:

• Buy ad credits on Google / LinkedIn
• purchase all business software for the year
• Invest in my pension
• Buy new computers and hardware for staff

Anything else I can do?

No stupid answers please 😅