The process, and the two places it stalls
Filing is straightforward. Getting to registration is where the work lies.
Objections and oppositions
An examination objection is not a refusal. Most are answered successfully with a reasoned reply, evidence of use, and where relevant a consent or coexistence arrangement with the earlier proprietor.
Opposition proceedings are adversarial and slower, involving pleadings and evidence. They are also frequently settled, particularly where the parties operate in different fields or territories and a coexistence agreement makes commercial sense.
Enforcement once you are registered
Registration gives you the statutory right to sue for infringement, which is considerably easier than a passing-off action based on reputation alone. Remedies include injunctions, damages or an account of profits, and delivery up of infringing material.
Practical enforcement also runs through platforms: brand registries on marketplaces, domain dispute procedures, and takedown mechanisms on social media. These are often faster and cheaper than litigation, and a registration is what makes them available.