Yes – the benefit of having an eiDAS compliant digital signature provider is that signatures made using the system are legally effective and comply with EU electronic signature laws.
The laws of the countries in the UK do not require a signature to be by hand on a piece of paper for it to be legally effective. Equally, a signature is not, alone, enough to make a contract legally binding. Under English law, other things are needed, including offer, acceptance, certainty of terms, consideration and an intention to create legal relations.
Some contracts, such as those made under Consumer Credit Legislation, require additional formalities to be legally binding