Thanks to everyone who has replied - I really appreciate the responses.
The clause has raised alarm bells and I just wanted to make sure I'm not over reacting due to the stress of moving / a recent family bereavement and my husband's tooth extraction last week (which was probably the most stressful!!)
[member=2128]Womble[/member] and [member=152775]arobwk[/member] Yes, I did wonder if they thought we could potentially be a pain in the backside and wanted to shut down any issues before they arise.
[member=4333]Fleecewife[/member] my immediate concern was that they had something up their sleeve! I did ask for confirmation and was told it would be normal farming activities. Not sure why they thought this might be an issue as we advised them that we wanted the land to graze sheep.
I think that I will have to go back to the solicitor and advise that it's the deal breaker clause

I do worry that we won't find anywhere else we can afford as prices have increased tremendously over the last 2 months.