No border control: illegally in the UK?

[Peted]

Hello everyone,

I've been in the UK for about a year on a Tier 4 visa, which is valid for some more years. Some days ago I travelled from London to Ireland. I had to go through immigration (passport control) in Dublin, and I was given a 90-day Irish visitor stamp. Two days later I returned to the UK, but there was just no passport control at all upon arrival here.

Is this normal?

Has this changed my visa category in the UK?

Have I entered the UK legally?

[CR001]

It's normal.

No change to your visa.