The gov.uk Guidance Note provides:
If there is a risk that you will be left in difficulties if the Building Owner stops work at an inconvenient stage, you can request them, before he starts the notified work, to make available such security as is agreed (or if not agreed determined by the surveyor/s), which may be money or a bond or insurances, etc. that would allow you to restore the status quo if he fails to do so.
The money remains the Building Owner’s throughout, but if, for example, you need to have a wall rebuilt, you, or more commonly the surveyors, can draw on that security to pay for the rebuilding.
This provision is usually reserved for particularly intrusive or complex works.