Hi Directive/2004/38/EC,
All Indian nationals who transit through London Heathrow need transit visa and that should be taken in form of visitor visa.
http://www.ukvisas.gov.uk/en/doineedvis ... vnationals
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Transiting to the Republic of Ireland
Passengers must pass through immigration control in order to take a flight to Ireland. Visa nationals (and passengers qualifying for DATV exemption above) may Transit without Visa providing they fulfil the TWOV conditions and are properly documented for entry into Ireland.
DATV nationals transiting to Ireland must obtain a visit visa - not a Visitor in Transit visa which is only for transit to a destination outside the Common Travel Area (Rules HC395 paragraph 47 refers).
All visa nationals wishing to transit the UK but spend longer doing so than the 24 hours permitted under the TWOV concession must obtain a visitor in transit visa for stays up to 48 hours or a visit visa.
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Technically she does qualify for waever (as she has category D visa) but it is throughly discuessed on various forums that immigration officer at Heathrow airport insist of having visitor visa (they threaten me to send back to India despite having all legal documents with me). I just want to avoid hastle.
In between aswadref worked well. Just an hour ago I was able to book tomorrows appointment. I think someone cancelled their appointment.
Thanks you for your post and I'll update u tomorrow about the rest...