Legal terminology - land purchase.

[Sagr]

I have Googled, but I am still unsure, so I hoped that someone could explain these terms in an email from my potential solicitor in an easy-to-understand way to a lay person.

Payment is proposed to be in two instalments, one year apart.

'...our fees would be £X plus VAT and disbursement. This takes into account the deferred second payment, which will be unsecured.'

1. disbursement
2. unsecured (in this context, I am unsure, as the results I found were regarding unsecured loans).

Disbursements are related costs/expenses not fees. For a property purchase it would be things like search fees, downloading file copies of the land registry entry etc.

The second part isn’t clear without context.

Thank you. That is helpful.
I may end up just (politely) asking them to clarify what they mean by 'unsecured' because I am unsure.