Well we don't have enough affordable housing for the people already here ...
So I can't see how increasing the population by 745,000 through immigration in just one year is not going to make the situation a whole lot worse.
This conflates two issues.
The lack of affordable housing has been caused by a number of factors - the sell-off of Council housing, no rent caps, poor planning laws that allow developers to build a few luxury houses when what is needed is more affordable homes, the concentration of investment in certain parts of the country while other parts have been left to decay, the low taxation of capital gains made by speculators and landlords, the proliferation of holiday lets and Airbnb, and the huge influx of money into the UK property market (much of it "funny money") from overseas, to name just a few.
Even with immigration, overall population growth in the UK has been stable at around 250,000 a year, or 0.3%, which is regarded as population stagnation. Of course immigration adds to the demand for housing, and the immigrants want to live where there are jobs (just like everyone else does) but these places are also the places where there is the greatest shortage of housing.
The housing situation could, and should, be being addressed by the Housing Minister. This week's Minister is apparently Lee Rowley (I had to look it up) who has been in post for less than a month. There have been 15 Housing Ministers since this government came to power in 2010. Formulating and then enacting a housing policy does not seem to be a priority for them, and whenever they do make a decision, it often appears to be more influenced by the property developers (who also happen to be big donors) rather than by the needs of the population.