I would be surprised if 23k was enough to live on as a family of 3, but it's possible. 27k might be better. But bear in mind that on the average of that, say around 25k, you would take home around 1,500 pounds per month. Renting a 2 bed flat/house might cost you between 800 and 1,200 per month, depending on the area and with bills and council tax. It would be hard, but would probably be just about possible. You would also need to factor in transport costs, which are high in the UK. For basic rent prices (net of bills and council tax) have a look at
www.rightmove.co.uk for a guide to what the rental costs are in your propsective area.
You would not be able to buy a house in the UK on 23-27K. Average house prices for entry-level properties are up around 160-200 plus in the south of the UK now, and most mortgage lenders will only lend 3.5 times single salary, which would in most cases leave you about 100k short. Most young lecturers in the UK now cannot buy unless they a) live in the North or b) have a wealthy partner or parents to help them out with a substantial deposit.
Z x