Whether it is a junction or not you might be judged to be parking irresponsibly or causing an obstruction if any one wanted to make an issue of it - from the Blue Badge Booklet:
Safe and responsible parking
Do not park where it would endanger, inconvenience or obstruct pedestrians or other road users. Examples of dangerous or obstructive parking include the following, although there are others:
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school entrances, bus stops, on a bend, or near the brow of a hill or hump bridge;
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parking opposite or within 10 metres (32 feet) of a junction, except in an authorised parking space;
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where it would make the road narrow, such as by a traffic island or roadworks;
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where it would hold up traffic, such as in narrow stretches of road or blocking vehicle entrances;
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where emergency vehicles stop or go in and out, such as hospital entrances;
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where the kerb has been lowered or the road raised to help wheelchair users; and
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on a pavement, unless signs permit it. The Blue Badge is not a licence to park anywhere. If you park where it would cause an obstruction or danger to other road users you could be fined or receive a Penalty Charge Notice or have your vehicle removed.
Dropped kerb
(I'm a blue badge holder's driver, and have studied the leaflet carefully after we got a ticket for parking on double yellows, with two yellow stripes on the kerb - no loading at any time)