Traditionally the average UK mortgage was based on a standard variable interest repayment mortgage. In recent years, financially liberalisation, has encouraged a range of non-conventional mortgages. In particular, the UK has witnessed an increase in the following types of mortgages:
Interest Only Mortgages. This mortgage is aimed at first time buyers, struggling to meet the interest payments on a new mortgage. It is related to the vast increase in house prices (UK house prices have doubled in past 5 years) The obvious disadvantage of interest only mortgages is that at the end of the term the borrower still owes the full amount of the mortgage capital.
Current account Mortgages. Mortgages, such as the One Account enable borrowers to combine their mortgage debt with their current account savings. It is popular because it enables savings to automatically offset the size of your mortgage, and therefore, reduce interest payments. – current account mortgages
Flexible Mortgages. Similar in principle to a a current account mortgage a flexible mortgage enables the borrower to vary the amount he repays. Therefore, he can seek to pay off the mortgage early, or in some months can arrange a payment holiday. This is popular with self employed workers.
Average mortgage Payments
Due to rising house prices, and rising interest rates, the average mortgage payment is increasing as a size of household disposable income. According to the Woolwich, mortgage payments account for 19.9% of average income, the highest since records began. 
Average mortgage payments are heavily dependent on the base rate of interest rate. For example, a quarter point rise in the base rate can increase the cost of variable mortgage payment by £25 for a £150,000 mortgage.
For those with interest only mortgages the increase in mortgage payments will be more noticeable.
The recent rise in interest rates has increased demand for fixed rate mortgages.
Average house prices have risen over £200,000