How to list travel history in the UK?

I am a 21 year old from Canada applying for a Tier 5 Youth Mobility Visa.
This is my travel history in the UK:
1: October 20th 2017 - Mid January 2018
2: Approx January 29th 2018 - January 31st 2018 (was in UK for around 2-3 days just catching a flight from London to Norway
3: March 15th - April 31st 2018
On my application it asks for my two most recent trips to the UK. I can ONLY list two maximum. I cannot list all three.
Should I not include my transit trip as it was so minor?
Basically should I list my March and January trips?
Or should I list my March and October trips?
I don't want to seem like I'm hiding my October history. But I want to do what's best.
Thank you!
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Can I get a record of my travel history UK?
You can request a copy of: an electronic summary of your immigration history. landing cards we hold electronically. visa applications you submitted from outside of the UK (as part of entry clearance)How do I create a travel history?
Make sure that you travel 1 or 2 countries in a single tour. Take a gap of 1 month or 2 months between your trip because it gives a positive sign that you are a genuine traveler and you don't visit these countries only for creating travel history.Does immigration know your travel history?
Answer: The Department of State does not keep records of citizens' travels. The only record of your travels is your passport containing entry and exit stamps. The immigration office of the country/s you traveled to MAY be able to provide you with information on your entry into their borders.How long is travel history kept?
The new CBP webpage allows nonimmigrant travelers to access arrival/departure records going back five years from the request date.The secret to completing your Travel History Correctly
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