I asked ChatGPT for the best energy tariff

I asked ChatGPT 

'If my electricity is 25.88p per unit and the standing charge is 43.66p for Tariff 1, and Tariff 2 is 24.96p per unit and standing charge is 62.22p, what would my usage need to be in kWhours for my bill to be the same under either tariff?'

It replied 'The usage needs to be approximately 20.17 kWh for the bill to be the same under either tariff.'

From the answer, it seems that one tariff would always be cheaper than the other as long as my usage was 20kWh or more which is easily surpassed as I use about 2000 kWh annually.

So I then asked:

'What would my bill be for one year of 2000 kWh of use under both tariffs?'

and got the reply:

Under Tariff 1, the annual bill would be approximately £676.96 (67695.9p), and under Tariff 2, it would be approximately £726.30 (72630.3p), assuming the standing charges are applied daily.

Simples! 

So I changed my Octopus electricity Tariff to the cheaper 12m fixed tariff since my annual usage will always be greater than a measly 20kWh!

New! - How to check if a firm is a scam

The Financial Conduct Authority (fca.org.uk) have a new facility (Dec. 2025) on their website called Firm Checker.

If you want to check if a firm is legitimate and what it is legally allowed to do, then this will tell you.

It will also alert you to known 'clone' firms (firms of a similar name or firms pretending to be the real firm).

If you or a relative has been contacted by a firm offering you a 'deal', you should be able to check them out.

Tip: Clone firms are often hard to spot. The number that you are called by can be spoofed. You should find the firms website using a search engine, check that the site looks genuine (e.g. test out all links and pages) and then contact that firm using their email contact address and phone number and ask if the person who contacted you is actually an employee.

Alway pay by credit card (not debit card) even if only part payment is made.

Make an Excel spreadsheet to compare today's stock prices with the 30-day average

I asked the Claude AI to make an Excel macro that would get the current stock price and compare it with a 30 day average price and show me the changes in coloured cells (light or dark green and red). 

Here is what I got:

Trading 212 update 2025-12-05

My ISA and GIA portfolios gained a bit this week (£100+£1k). I have started to sell some of my smaller holdings (<£50) and also sold Regeneron Pharmaceuticals (triggered by a Stop Loss limit) for a profit. My main sell inside my ISA was of Sylvania Platinum which made a very small loss (it did not seem to be moving much over the last 2 months). I rebought Greatland Resources GGP in my ISA (£500 worth - currently 2% up).

I sold Regeneron Pharmaceuticals for a 10% profit!

I tipped and bought Regeneron in early November and in total bought £2k. I sold it on the 27th November for a £223 and 11% profit as the price started to drop and I had set a stop loss limit and so was stopped out.

Is Greatland Resources rebounding?

I bought GreatLand GGP at the end of September 2025 and sold in October for a quick 10% profit when it started to dip. It is a gold and copper miner.

I hung on to a small fraction however (about £20) so that I could easily track it in my Trading 212 ISA.