Yes, it doesnt matter if you provide to us the transaction id and your bitcoin wallet, there is no way that we can recover those bitcoins because you should know that bitcoins are untraceable, so we can not recover those coins again.
It is your fault, you should try to improve your security and try to be more updated about that , there are a lot of ways to make your wallet much more secure than now, you should try to make your own research through your own wallet..
I grow tired of the high and mighty people on here saying how its their fault, weather or not they laxed on security, did they sign the transaction? No. Doesn't get them their coins back, but they DIDN'T do it. Even those who had secured their private keys were hit by stolen coins when the RNGs were faulty and leaked the private keys from nothing more than signed transactions from the blockchain, as value k was reused. Even if they had been used for transactions on a hardware wallet, a faulty slip up in the RNG or an accidental re-use of k would render even those vulnerable.
Don't get cocky and have some compassion for crying out loud, hes just lost over £100k. Thats more than many will ever see in life savings. This is one thing that will hamper bitcoin adoption, people like this. Two of my friends read posts like this and decided to stick with fiat. A bit like saying someones fault they got robbed for not realising a yale lock wouldn't keep them out. And your private keys may be secure now, but you never know, so don't get cocky, and certainly do not store your funds in a single wallet. If someone REALLY wanted your keys, they would get them, see $5 wrench attack. Legacy wallets are also not quantum computer safe, either.
No system is 100% secure, even older trezor wallets if you had possession of them could be hacked into via an exploit that has been used successfully, and how many non updated trezors are currently in vaults? No system is 100.00% secure, so again, don't get cocky.
As for this guy, did you enter you seed anywhere where you could claim 'free bitcoin gold' etc, or did you download the real electrum, there are some fake electrums out there that swipe coins, did you download it from electrum.org? If you downloaded it from anywhere else, chances are it is a fake.
Sorry to hear of your loss £100k+...