Transit between LHR and LGW without visa? (Shifting airports inside UK with Irish Biometric visa)

I am travelling from India(BOM/MAA) to Dublin. I do not have direct flight to DUB as an option, the flight stops at AUH/DXB/LHR and from there to DUB. Apparently, there is a 300£ difference in the flight cost from LHR to DUB and LGW to DUB. Given that I hold an Irish biometric visa, and confirmed tickets to DUB within the same day, am I allowed to go from LHR to LGW without going through the Border Force/immigration checks? In this link that I found, in section 6 it says that I am allowed to leave on the same day, is it also valid for different airports?

P.S : My visa is employment (single entry) with format D and BC (biometric)

Thanks and Regards, Ramana

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Do I need a visa to transfer from Heathrow to Gatwick?

Do not go for any flights that involve a Heathrow/Gatwick connection - that will definitely require a visa as you are entering the UK and the journey between the 2 airports can be bad and requires you to transport your bags.

Is biometric required for UK transit visa?

You must apply online for a Visitor in Transit visa. You'll need to have your fingerprints and photograph (known as 'biometric information') taken at a visa application centre as part of your application.

Can I change airport in London without visa?

You may need a Direct Airside Transit visa if you will be changing flights in the UK without going through immigration control and you are from outside the European Economic Area (EEA) or Switzerland. You should check your eligibility for transit without a visa before applying for a direct airside transit visa.

Do I need transit visa for UK if I have Irish visa?

If travelling on an eligible Irish visa, departing the Common Travel Area from Ireland and transiting the UK on departure, the date of permission to be in Ireland must be still valid, on transit through the UK, in order to qualify for an exemption to a UK transit visa (see 12 below).

Connection in London Heathrow

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