buying land as a group

I'm thinking of purchasing agricultural land speculatively as part of a group of 5 people (no mortgage).
I'm trying to find out if there is anything onerous from a legal perspective in making this initial purchase , i.e. signing a contract for sale as a group of 5 people.

Thanks

The only issue is the windfall tax.

There are questions you all need to think about -
How is it to be owned - joint tenancy or tenancy-in-common? Tenancy-in-common is more usual for business arrangements.
Would a company structure be a better idea?
What happens if one of you wants to sell, but the others don't? A contractual arrangement to deal with that eventuality should be in place
Likewise, what if one dies?

Get competent legal advice before getting involved, and ensure everything is sorted now, before investing. Poorly thought out arrangements have a habit of going wrong and costing a fortune to sort out.