My opinion is it's not always easy to precisely pinpoint an accent unless that is what you specifically study, but it is definitely southern English estuary and seems to have an Essex twang that despite being educated she cannot quite shake off. After a google search it seems she was born in High Wycombe. and her family names is Swedish, her family may be Swedish or German. High Wycombe is southern England and Estuary mixture of middle class and poor with very rich areas also. And lots of immigration and also people being evacuated there in the second world war which lead to many Londoners and Essex people settling or later moving there. Giving some areas around high Wycombe an accent close to working class London or Essex of the 1940's to 1960's.

In my opinion: 1. Somewhere between Estuary and Standard Southern British. 2. Somewhere between Standard Southern British and RP.

from https://en.wikipedia.org/wiki/Estuary_English Status as accent of English The boundary between Estuary English and Cockney is far from clearcut.[12][13] Several writers have argued that Estuary English is not a discrete accent distinct from the accents of the London area. The sociolinguist Peter Trudgill has written that the term "Estuary English" is inappropriate because "it suggests that we are talking about a new variety, which we are not; and because it suggests that it is a variety of English confined to the banks of the Thames estuary, which it is not. The label actually refers to the lower middle-class accents, as opposed to working-class accents, of the Home Counties Modern Dialect area".[14] Peter Roach comments, "In reality there is no such accent and the term should be used with care. The idea originates from the sociolinguistic observation that some people in public life who would previously have been expected to speak with an RP accent now find it acceptable to speak with some characteristics of the London area... such as glottal stops, which would in earlier times have caused comment or disapproval".[15] Foulkes & Docherty (1999) state "All of its [EE's] features can be located on a sociolinguistic and geographical continuum between RP and Cockney, and are spreading not because Estuary English is a coherent and identifiable influence, but because the features represent neither the standard nor the extreme non-standard poles of the continuum".[16] In order to tackle these problems put forward by expert linguists, Altendorf (2016) argues that Estuary English should be viewed as a folk category rather than an expert linguistic category. As such it takes the form of a perceptual prototype category that does not require discrete boundaries in order to function in the eyes (and ears) of lay observers of language variation and change.[17]

This is in the range of a standard southern English accent. More on "estuary" at https://www.newstatesman.com/society/2007/09/posh-language-english-recenthttps://pronunciationstudio.com/estuary-english/ https://www.urbandictionary.com/define.php?term=estuary%20english https://www.phon.ucl.ac.uk/home/estuary/whatis.htm