FTB - Making an Offer

Hi all!

My partner and I have started making moves towards buying our first place together (London) and are looking for some advice on making an offer while renting.

We can’t get out of our lease until August (unless we asked the landlord for a surrender which is unlikely). Would you advise disclosing this to sellers/agents when making an offer? Or should we keep this to ourselves until negotiating completion dates?

Thanks in advance for your insights :)