Eucalyptus Gunnii would be my guess.

Don't think it is gunni as that has rounded heart shaped leaves. I originally asked as I'm going to try growing it indoors

I think its probably E. gunnii too - the young leaves are much more rounded, whereas mature leaves are not, and I can see some newer, rounded leaves lower down on this plant.

It will not cope indoors - in fact, they don't like being contained in pots indoors or out for too long because they put down a very, very deep taproot, and this they cannot do in a pot. If you've planted in the ground, I suggest you move it away from the house wall asap rather than letting it grow any bigger. They are fast growers and need to be planted a minimum of 40 to 50 feet away from a house or structure, even if you intend to keep it well pruned to maintain it as a small tree.

I will keep it inside until it dies i think i don't really want it romping away outside will think about it. Thanks for your info on the root that was really important as i hadn't thought about that. That's why i like GOY because people take the time to explain everything.

ContainerGrown. Eucalyptus make an excellent choice for growing in a pot. Either on a sunny patio or even indoors so long as there is plenty of light. Container-grown specimens will grow slower than those planted in the field, and would need to be kept pruned to a reasonable size. This what persuaded me to put in a pot inside.

Well, how interesting and how things move on - the RHS has changed its advice in regard to growing Eucalyptus gunnii in pots! Well, sort of,they don't really say whether they recommend it or not. Whatever they say, I never had any success with them in pots, I found they lasted around 18 months if I was lucky. I was trying to grow them as shrubs, stooling them in spring... which works well in the ground. I had one in the garden kept as a small tree for years, and seedlings used to pop up periodically, so I tried more than once with those, but my horticultural college lecturer confirmed they don't last long in pots, so I stopped trying. Link below for what they say now

https://www.rhs.org.uk/plants/popular/eucalyptus/growing-guide

Thanks again I'm sure you are right