if you loose in court, he may decide to counter sue you and if he won, a judgement would be issued
this is totally worse case scenario but :
His costs for seeing you in court say roughly:
Day off work: £300
transport : £20
Solicitor £500
Then he counter sues you
Time to prepare say 1 day £300
Transport £20
Solicitor £500
Court cost: £70
Compo??
your already pushing 2k before compo! and thats playing it safe could charge 500 a day for work you never know
If he doesnt answer the phone, tried a friendly letter? Have you a receipt?