//Where does your figure of 15,000 come from?//
That figure has been bandied about as “attempted” during 2020. It’s rubbish. There are four classes of actual and attempted illegal migrants:
(a) Those who made it here, were counted as they came ashore and processed by the authorities (that’s the 8,500).
(b) Those who tried to get here but were returned to France.
(c) Those who made it here but were not counted as they came ashore.
(d) Those who tried to get here and failed for some reason.
The authorities know about (a) and (b). They nothing about (c) and (d) – and there is every likelihood that the numbers in class (c) are substantial.
//i dont get how you think people here illgally will get the vaccine?//
Those in (c) above will in all probability not receive the vaccination unless they get taken under the wing of some refugee support organisation. Those in (a) above are immediately afforded the full care and protection of whichever Local Authority they end up in. They will almost certainly be classified as “homeless” and as I said, homeless people being prioritised for vaccination.