It is difficult to give an exact timeframe for compliance with UK-REACH. Compliance timelines will depend on your company's size, the number of substances produced or imported, and the level of preparation already in place.

The registration deadline for the first phase of UK-REACH is January 28, 2021. The registration deadline for the second phase is January 27, 2024. These dates may change depending on government decisions.

It is recommended to start preparing as soon as possible to ensure that you meet the registration deadlines and have enough time to implement any necessary changes to your business operations. It can be a lengthy process to identify the substances that require registration, gather the necessary data, and prepare and submit the registration dossier. Seeking expert advice and support is also beneficial to ensure full compliance with UK-REACH.

Overall, the compliance process can take several months to a few years, depending on the complexity of your company's operations and the number of substances to be registered.