short term let wanted

Hi, I am new to 'posting' so please bear with me! My partner and I have just moved to London and are staying with friends whilst looking to buy.. We don't want to commit to a long term rental but hope to find a short term let. We have made frequent visits to the area over the last year and really hope to be able to rent and then buy somewhere locally. We are looking for a 2 bedroom flat for us and one grown up son. Any ideas gratefully appreciated! Many thanks all, Sue.