If you're planning on buying this year then you don't want anything risky. Things like a stocks and shares ISA may be OK in the long term but there's every chance that their value may have dropped at a set date in the near future (as an example one of my "high risk" pots in a stocks and shares ISA has lost 10% in the past week).
As others have said, go with savings accounts. Try not to open shed loads of new accounts to take advantage of all the deals as there is a possibility this may hit your credit rating a little.
If you're planning on buying this year then you don't want anything risky. Things like a stocks and shares ISA may be OK in the long term but there's every chance that their value may have dropped at a set date in the near future (as an example one of my "high risk" pots in a stocks and shares ISA has lost 10% in the past week).
As others have said, go with savings accounts. Try not to open shed loads of new accounts to take advantage of all the deals as there is a possibility this may hit your credit rating a little.