Most asylum seekers come in by lorry as it's safer. Sajid Javid's emphasis on boats is just to position himself as a man of action for when Theresa May steps down.
Despite the efforts of some to get to the UK, we had just 5% of the 650,000 asylum applications in 2017. By contrast, 30% were in Germany, 20% per cent in Italy and 14% in France.
https://ec.europa.eu/eurostat/web/as...visualisations