No Automatic Right to Amend Your ET1: Why New Claims Are Not Guaranteed – The Selkent Bus Principles Explained

Many employees assume that once their ET1 claim form has been submitted, they can easily “add in” new claims, legal arguments or factual allegations later in the process.

This is wrong.

The Employment Tribunal has a discretion—not an obligation—to allow amendments. There is no automatic right to expand an ET1 after it has been lodged, especially where a claimant tries to introduce:

• a new cause of action (e.g., discrimination, whistleblowing, automatic unfair dismissal), or

• new factual allegations not originally set out in the ET1.

The leading case setting out the rules is Selkent Bus Co Ltd t/a Stagecoach Selkent v Moore [1996] IRLR 661, a decision that continues to shape amendment applications today.

What the Selkent Bus Case Really Says

In Selkent, the Employment Appeal Tribunal explained that amendment applications require the Tribunal to take all circumstances into account and to apply a broad “interests of justice” test.

The Tribunal must balance:

• the injustice and hardship of allowing the amendment,against

• the injustice and hardship of refusing it.

The judgment makes several key points:

• Adding a new cause of action is very different from simply adding more details.

• A claimant seeking a late amendment may need to justify why the point was not raised earlier.

• If the new claim is out of time, statutory limitation rules must be considered before it can be allowed.

The Key Selkent Factors (Non‑Exhaustive)

When deciding whether to permit an amendment, Judges will consider at least the following.

1. The Nature of the Amendment

Tribunal amendments fall into three broad categories:

✔ Trivial corrections

Such as spelling mistakes, incorrect dates, or clarifying small points.These are usually allowed.

✔ Adding factual detail to an existing claim

Often permitted, particularly if requested early and without disrupting the timetable.

❌ Introducing new causes of action or new factual allegations

These are treated with great caution.If an amendment would fundamentally change the case so that it becomes a “new claim”, the Tribunal may refuse it—especially if the new claim is out of time.

2. Time Limits: Is the New Claim Out of Time?

If the claimant is trying to add a new statutory complaint, the Tribunal must ask:

• Is this being added after the three‑month limitation period?

• If so, should time be extended?

If the new claim is out of time and no statutory extension applies, the Tribunal may have no choice but to refuse the amendment.

3. Timing and Manner of the Application

Even though amendments can technically be requested at any stage, the Tribunal will look closely at:

• Why the point was not raised earlier

• Whether the facts relied on are new, or were always within the claimant’s knowledge

• Whether the application is made just before a hearing

• Whether the amendment would cause delay, require an adjournment, or significantly increase costs

• Whether major new evidence or witnesses would be required

Late applications must be fully justified.

Why the Amendment Was Refused in Selkent

In Selkent, Mr Moore originally lodged a claim for unfair dismissal. Shortly before the hearing, he attempted to add a claim for automatic unfair dismissal for trade union reasons, supported by factual allegations that were not in the original ET1.

The Tribunal identified key problems:

• No explanation for why the new facts were not raised earlier

• The amendment was, in substance, a completely new claim

• The new claim was out of time

• Allowing it would require delay and additional cost

The EAT held that the amendment should not have been allowed, although the original unfair dismissal claim could still proceed.

Why Selkent Matters for All Claimants

A defective ET1 can have serious consequences. If your claim form is incomplete, vague, or missing entire causes of action, you may find that:

• You cannot add new claims later

• You are barred by time limits

• The employer raises valid objections

• The Tribunal refuses your amendment

• Your compensation or remedy is reduced—or lost entirely

Your ET1 defines the scope of your case. Amendment is never guaranteed.

Practical Advice: How to Protect Yourself

To avoid the traps highlighted by Selkent:

✔ Include all potential claims in your ET1

Discrimination, whistleblowing, equal pay, victimisation—if it’s relevant, it must be stated clearly.

✔ Set out the core factual allegations supporting each claim

Do not rely on the Tribunal to “read between the lines.”

✔ Never rely on witness statements to fix defects

A witness statement cannot introduce a new claim.

✔ Seek legal advice before submitting your ET1

Professional drafting can prevent the need for difficult amendment applications later.

✔ If you genuinely need an amendment, act quickly

Explain clearly why you did not raise the issue earlier and why allowing the amendment is in the interests of justice.

Final Thought

Once your ET1 has been submitted, you cannot reinvent your case. The Tribunal must ensure fairness, efficiency and proper case management.

The Selkent Bus decision remains a powerful reminder:

You must get your ET1 right the first time.

Amendments are possible — but far from automatic.

Keywords: ET1 amendment, Selkent Bus, Employment Tribunal amendments, add new claim ET1, unfair dismissal claim, discrimination claim, whistleblowing amendment, out‑of‑time claims, employment solicitor advice.