What result do I record?

This is from the UK, I've no idea how these things are done abroad fwiw.

I have to record results based on taking multiple readings, at least 3, until the results settle. Here are this evening's results:

140/92

144/83

133/86

140/88

128/86

122/83

As you can see it varies and doesn't really settle. I only stopped because it was a positive result and I can't sit there all night!

So given all that should I record the lowest result? I wasn't told to take averages for instance. Just the result when it settles. As you can it sort of doesn't.

Last time I had to check the pharmacist said just record the lowest result in the sitting. It seems that the method varies regardless of who you speak to

Thanks